regardless if you are recording DI to your PC/MAC or with a small Tascam portastudio - the same applies - get the levels as high as possible without distortion. Use some riffs that will be on the song,or chord progressions
, and watch the levels. Avoid reverb, instead use the sends on your program to add some compression and delay(just a tad). Reverb washes away the original sound quality from the track. After you record and it sounds "cool" to you, create a duplicate or "clone" of the track and apply to the sound. This will create a phase effect that fattens up the sound without losing quality. You can also do other things with the 2nd track with a little imagination.