Wasnt talking about the achivements, Rockstar ran a competition on the social club site (
ROCKSTAR GAMES SOCIAL CLUB) where if you got 100% in the first week would get a nice key to liberty city.
I managed to get up to 90% tonight just by doing some current crimes on the police computer, still need to get pigeons but thats taking ages as I am not sure which ones I have already got. Also need to do races but for 3 in game days tonight there was none running.