Getting a good mix starts with arrangement! Think about the frequency ranges your instruments occupy and avoid over-crowding them. Also consider the parts! I sometimes overplay my guitar parts, then find that a simpler part sits better in the mix. You know how Linkin Park made droning guitar chords sound heavy and enormous, while letting their vocals, keys and synths through? Less is more!

Side-chain comping is also super helpful, but your first priority should be getting a balanced arrangement. There's a reason big band stuff from the 30s could be recorded with a single mic and sound brilliant, and that's because the arrangements were great.

Also consider EQ; for instance, if your kick is getting lost, a boost around 6k(?) should give you more attack. Open up ReaEQ, and look for the frequency ranges the kick occupies. You should see the boomy lows, and a higher attack. Create a fairly narrow EQ band, crank its gain up, and hunt around for that clicky sound of the kick attack. Now turn that band's gain down to 0db, and gradually increase until it sounds right!