World Record Attempt
Idea
There are some bonkers but very achievable world records out there. Register at guinnessworldrecords.com and go from there.
You could seek to break an individual record, inviting local residents to come to a training session before the real deal. (For example: fastest time to put 24 cans in a fridge = 9.76 seconds. Most t-shirts put on in 60 seconds = 31.) Or why not invite a group to try and break a record, it could even include your whole community!
Resources
All you need is a good idea, why not try www.thrillist.com/gear/17-easy-to-break-world-records
Key requirements
Contacting Guinness World Records
Getting the word out