Here's a basic tip I wish I had been told sooner: when recording a guitar part, record it with two mono tracks instead of stereo tracks, and make each mono track a different recording (in other words play it twice) and then pan one of those tracks all the way to the left, and the other one all the way to the right. This is almost the same as recording one stereo track, but the difference is that having two separate recordings of the same part makes it sound much more full. This isn't universal, and sometimes you'll instead want to pan one part to the left and another very different part to the right, and sometimes you might want a lead part to be panned in the center. But always record with mono tracks when recording guitar, and usually panning two different recordings like that works best. Sorry if you already knew any of this