Got to a point where you may have exhausted the friends you have kept in touch with for sponsorship?
Then join friends reunited for £7.50 so you can email direct old school pals who you have lost touch with but are probably earning a bob or two.
I got the idea when I emailed someone I get the odd Christmas newsletter from but haven't heard from since I left school. He lives in Namibia and sponsored me £100! I emailed 10 friends yesterday.
I'll let you know the result!