what usually worked for me is that i say that im soooooo busy and after they ask that for the 50th time and i reject for the 50th time, most people get the idea. kinda like:
idiot: "Dude.. can you like fix my computer.. i shoved a screw driver in the cd-rom, and now it wont work"
you: "hey, ya that'd be great, id love to help, when is good?"
idiot: "Uhhh, now?"
you: "ohhh.. now isnt looking too good, i have to turn in the TPS reports... how about some other day, i'll let ya know when i have some free time"
idiot: "uhhhh sounds good. thanks again man, you rock!"
you: "i know, i know =)"
hehehehe, just like that!
