My parents thought I always signed up to help prepare the food--got me out of alot of "sitting time". We'd go outside and do "whatever" and get back in in time to help serve. When I was a teenager, I'd get tonsilitis when it was time for assemblies. Can't fake that. Some "higher power" was helping me out and getting me out of assemblies!
This was done by someone else--print a bunch of fliers the size of checks and keep putting them in the contribution boxes!!
Another thing I did was to volunteer to help take care of somone's toddler. Can't help it if he/she started crying when I needed a break!!
We'd always get busted writing notes. But it was a good idea to get some crosswords or find-a-word. OR take some books of another religion or apostate ones.When you are suppose to look up a scripture, say something like, "Oh, I brought the wrong books again." Hold them up so everyone around you can see them and hear you.
Good luck and have fun!