I have question about pull-offs.When I do a pull-off from (for example) third fret to second fret, shell I then push (down against the "wood") the finger on the third fret extra hard just before the pull-off to get a better sound?
ps Sorry if my english isn´t the best,but I hope you understand
No, you do not need to push down harder before you pull or push off. What is important is that the pull or push off be done with a quick, solid, "authoratative" motion, as that is what brings out the sound of the pull off or push off.
For me, the key to good pull/push offs was to remember that it is really a pull off and not a lift off. I do not think that pushing down extra hard prior to the pull off accomplishes anything other than, maybe, sharpening the note.
What you need to to remember is that it is a pluck-off as stated earlier.
There are two ways to do it, push-off and pull-off. The finger comes off the string either way but in the push off, you push the finger up towards the ceiling and (hopefully) re-pluck the string with the left-finger. In the other, you pull the finger down toward the floor and try plucking the string.
It's easier to practice the 2-0 pull-off on the 1st string and the 2-0 push-off on the 4th string before working on the 3-2 push-/pull-off on the 3rd string.
For the 2-0, pluck the string fretted, then pull/push and have it actually snap from the left finger leaving and sound like you actually plucked with the right hand.