It depends on what is causing your problem. If it's your right hand (assuming you're right handed- I mean the pick hand
), there is a couple of tricks. I tap with my index finger, and to get more power, I double my middle finger over it, so the tip of it is pressing on the nail of the index finger. This gives more power. Also, rest your thumb on the guitar body/neck to get stability. One other thing, turn your guitar around, so you're playing it left-handed (see previous assumption
), and practise doing pull-offs with your right hand, just like you would with the left hand- this will help build strength, and teach your finger the correct technique (remember, you should be sort of plucking the string to get a sound as you pull off).
For the left hand, well....... the problem could be hammering onto the string, or pulling off (or both
). For hammering on, I'd recommend making as small a movement as possible (ie don't pull your fingers back to right angles to the frets, then throw your fingers at the strings)- try to get power without big movements- less movement will improve accuracy and therefore sound production (and make sure you're tapping right behind the fret, not in the middle!). For pull offs, try turning your guitar around (again. Sorry, ex-classical guitarist here, these are good techniques for that), and practise 'walking' your fingers over a string (only one). If you know any classical right hand technique, apply it here. Bassically, place your finger on the string to pluck, then pluck the string (pluck through the string, don't curl your finger), and come to rest on the string above it. This is how you should do pull offs once the guitar is around the right way.
Hope that's slightly helpful and/or understandable. Kinda hard to explain without showing you
