like the others, i used incomplete sentences simply because i wanted to list all the highlights in the small space they provided...i think the main thing is to remain consistent with all of your descriptions so that they are easy to read and follow. i chose to list the position title (volunteer, member, president, etc.) followed by a colon and short phrases or describing words that gave the adcoms a clear idea of my responsibilities, roles, duties, etc. i composed all of my little write-ups on word then just pasted it into pharmcas...that was easier for me...oh yeah, check and recheck and have someone else look over your work...you hate to be judged on typos! good luck with your application!