Hi, and welcome to the forum.
This is kind of a big, non-specific question, which may explain why you haven't gotten replies so far. If you can scale things down a bit and get a little more specific, you may get more help. That said, here are a few things:
1. Print a hot signal when you can: Obviously, you don't have tape hiss when dealing with digital, but it can become problematic in analog if you don't print your signals hot enough.
2. Depending on what kind of production you envision, it might take a bit more planning when dealing with the (relatively) limited restraints of 8 tracks. You can save tracks by combining two different instruments on the same track if they don't occur at the same point in the song, for example. Also, if you do bounce some tracks together, try combining ones from different ranges if possible. For example, instead of bouncing a bass guitar and kick drum together, try a kick drum and a lead melody. This will still allow you some relative control over their blend via EQ. In this instance, you could bring the kick drum up or down in volume by boosting/cutting the lows while leaving the high melody relative untouched.
3. Obviously, keep your heads clean and your machine well-maintained.
4. Take advantage of recording "live tracks" along with a bounce when possible if you're short on tracks. For example, if you're going to bounce down a kick (track 1) and a lead guitar (track 2) onto track 8, record the tambourine on track 8 as well at the same time.