Put in a reference CD, see what it is you like about the CD and work to get a comparable sound. Just remember, you are going for a mix. Don't try to get the level as hot as the reference CD, you're reaching for the tone, balance and placement in…
The difference between mixing...
During the mix process the individual tracks are treated with eq, compressor, reverb, delay, and other effects. When the mix is finished, it is ready for mastering.
...and mastering
During the mastering process, the finished stereo mix is treated with phase linear equalizers, special hardware compressors,…