To get the most(sustain) out of the guitar you have, here's a few tips, A well set-up action with absolutely no strings buzzing on the frets, a well made nut thats made from a good material, alot of lower price range guitars come with cheap plastic sustain sucking nuts, make sure your pick-ups adjusted correctly, to far from the strings handicaps the pick-ups ability to sense vibration, to close ( mainly a sinlge coil problem) and the magnetic pull can be strong enough to dampen the vibration of the string, make sure the bridge is well mounted and in good shape, thats about the best you can do except maybe buy a 100 watt Marshall, 2-4x12 cabs, turn everything up on 10 and grit your teeth!