zephead said:
how much you apply is way more important than how. whether you put a drop in the middle of the cpu or you spread it out, it'll turn out the same no matter how you lay it on: the hsf will squeeze it down to a film.
I must say this is totally wrong. Its the other way around, as long as you put at least half a bb-size.
Applying even Arctic Silver 5 wrongly and getting air between your CPU and HS will be worse than using stock HSF.
Also, touching any of the surfaces or thermal paste with bare hands will leave carbon residue: not as efficient as it can be. Carbon is a great insulator, the main reason why people can walk on red-hot coals (walk on the ash).
And I think it was mentioned: AS5 is made of silver, and silver conducts electricity. Not good to have too much lying around.
Even if it wasn't AS5, the compound may store static; again, not good to have too much around your CPU.
Follow the instructions, if it says put the whole tube, do it. If it says 1/8 of a grain of rice, do it (good luck getting that little seperated). If you're not going to follow instructions, might as well not read them in the first place (like I do in some cases

)