Hi Gareth - plan now and get ready to implement a 1,2,3 final push
1) 5 days to go, almost there!
2) 3 days to go, even $20 will help!
3) tomorrow is last day! Be part of the team!
Get emails out to all friends and family and current donors. USE those list-servers.
The non-profit I worked at up until 2 months ago typically got 60% of the ANNUAL online donations in the last 5 days of the year, with a huge spike near New years eve (for tax purposes there, unfortunately this effort is not tax deductible). Don't slouch for the final push, it is the best time to get folks to pull the trigger.
Make your messages personal, emotional. You love your work and want to share an opportunity to be part of the team. "Pledge to help save the lives of research scuba divers!"
:-)
Cheers,
Chris