To Do 6 to 12 Months Before The Wedding or Celebration

____ Decide event purpose (raise funds, visibility, celebration, etc.)
____ Create a folder or computer file to keep all of your information and phone numbers in
____ Choose a theme
____ Visit potential sites
____ Research/appoint an event coordinator/manager
____ Research/select committees/chairpersons
____ Chairperson forms subcommittees
____ Get cost estimates (site rental, food, drinks, sound/lights, etc.)
____ Get recommendations for entertainment; hold auditions
____ Get bids for entertainment
____ Get bids for decorations
____ Get bids for design/printing
____ Get bids for other major items
____ Finance committee drafts initial budget
____ Decide on admission cost
____ Create sponsorship amounts/levels
____ List items to be underwritten and possible sources
____ Research/approach honorees
____ Compile mailing list (individuals/businesses)
____ Check proposed date for potential conflicts, finalize date in writing
____ Get written contracts for site, entertainment, etc.
____ Develop alternative site (if event is outdoors)
____ Consider pre-party event for publicity or underwriting
____ Invite/confirm VIPs
____ Pick graphic artist; begin invitation design
____ Create logo for event with graphic artist
____ Order hold-the-date cards or other event announcements
____ Set marketing/public relations schedule
____ Develop press release and calendar listings
____ Select photographer; arrange for photos of VIPs, chairmen, honorees
____ Get biographical information on VIPs, celebrities, honorees, chairmen
____ Investigate need for special permits, licenses, insurance, etc.

3 to 6 Months Before the Wedding or Party

____ Begin monthly committee meetings
____ Write/send requests for funding or underwriting to major donors, corporations, sponsors
____ Request logos from corporate sponsors for printing
____ Review with graphic artist invitations, programs, posters, etc.
____ Prepare final copy for invitations, return card, posters
____ Prepare final copy for tickets
____ Complete mailing lists for invitations
____ Order invitations, posters, tickets, etc.
____ Sign contract with entertainment company
____ Make list of locations for posters
____ Finalize mailing lists; begin soliciting corporations and major donors
____ Obtain lists from honorees, VIPs
____ Obtain radio/TV sponsors, public service announcements, promos
____ Set menu with caterer for food and beverages
____ Secure permits and insurance
____ Get written confirmation of celebrity participation/special needs
____ Finalize audio/visual contract
____ Select/order trophies/awards

2 Months Before the Wedding or Party

____ Hold underwriting or preview party to coincide with mailing of invitations; invite media
____ Assemble/address invitations (with personal notes when possible)
____ Mail invitations
____ Distribute posters
____ Finalize transportation/hotel accommodations for staff, VIPs, honorees
____ Obtain contracts for decorations and rental items
____ Confirm TV/radio participation
____ Release press announcements about celebrities, VIPs, honorees
____ Follow up to confirm sponsorships and underwriting
____ Obtain logos from corporate sponsors for program printing
____ Review needs for signs at registration, directional, etc.
____ All major chairpersons to finalize plans
____ Hold walk-through of event with responsible committees, chairpersons and responsible site staff members at event site
____ Review/finalize budget, task sheets and tentative timeline
____ Start phone follow-up for table sponsors (corporate, VIP, committee)

1 Month Before the Wedding or Party

____ Phone follow-up of mailing list (ticket sales)
____ Place newspaper ads, follow up with news media, on-air announcements
____ Confirm staff for registration, hosting, other
____ Write to VIPs, celebrities, program participants, confirm participation
____ Complete list of contents for VIP welcome packets
____ Get enlarged site plan/room diagram, assign seats/tables
____ Give estimate of guests expected to caterer/food service
____ Meet with all outside vendors, consultants to coordinate event
____ Review script/timeline
____ Continue phone follow-ups for ticket/table sales
____ Continue assigning seats; set head table, speaker's platform
____ Confirm transportation schedules: airlines, trains, buses, cars, limos
____ Confirm hotel accommodations
____ Prepare transportation and accommodations (include arrival time, flight number, airline, person assigned to meet flight)
____ Confirm special security needed for VIPs, event
____ Prepare welcome packet for VIPs, chairmen, and key staff
____ Schedule deliveries of special equipment, rentals
____ Confirm setup and tear down times with event site
____ Finalize plans with party decorator
____ Give caterer revised numbers
____ Meet with chairpersons, key staff to finalize any of the above

1 Week Before the Wedding or Party

____ Meet with all committees for last-minute details
____ Finish phone follow-ups
____ Confirm number attending
____ Finish seating/table arrangements
____ Hold training session with volunteers; finalize assignments
____ Secure two or three volunteers to assist with emergencies
____ Finalize registration staff
____ Distribute seating chart, assignments to hosts/hostesses
____ Schedule pickup or delivery of any rented or loaned equipment
____ Double-check arrival time and delivery times with vendors
____ Reconfirm event site, hotel, transportation
____ Deliver final scripts/ timelines to all program participants
____ Finalize catering guarantee, refreshments
____ Confirm number of volunteers
____ Make follow-up calls to news media for advance and event coverage
____ Distribute additional fliers
____ Final walk-through with all personnel
____ Schedule rehearsals
____ Schedule volunteer assignments for day of event
____ Establish amount of petty cash needed for tips and emergencies
____ Write checks for payments to be made for the day of the event

Day Before The Wedding or Party

____ Lay out all clothes that you will need the day of the event
____ Recheck all equipment and supplies to be brought to the event
____ Have petty cash and vendor checks prepared

Day of the Wedding or Party

____ Arrive early (with your change of clothes)
____ Unpack equipment, supplies and make sure nothing is missing
____ Be sure all VIPs are in place and have scripts
____ Reconfirm refreshments/meal schedule for volunteers
____ Go over all the final details with caterer and setup staff
____ Check with volunteers to make sure all tasks are covered
____ Setup registration area
____ Check sound/light equipment and staging before rehearsal
____ Hold final rehearsal and/or review check list
Place a check mark next to the items that do not pertain to your event first, then check off each completed task until every task is checked off.
Are you hosting a party, planning a wedding and you need a checklist to make sure everyting gets done?  Here is a list I found on -The Great Event.com that seems to cover most of what you will need to accomplish for a successful event.  
event check off list
To reprint only the list:  Highlight the list then paste and save as a word document
Planning a party and you need a little help staying on track or a check off list?  Here is a list for you to follow.