Whether you are going on tour with a new artist, running sound for a local venue, or working for a sound company there's a lot more to mixing a great sounding show than just turning knobs and pushing faders.
Step 1- Do your homework-what kind of music will you be mixing? Learn the artist's songs and get familiar with the style of music. If you are going tour with them as their sound engineer you'll want to deconstruct the songs and make lots of notes.
Step 2- Communicate with the artist, band, or client on what their needs are. What ideas do they have for their sound? How many inputs do they have? What are they? What do they need in the way of monitor mixes? What songs have solos or instrument changes, go through the set list so you know what to expect for each song- different vocalists? BGVs? Solos? Are there any specific cues?
Step 3- Show up prepared. Have an input list, stage plot, and audio spec. Advance the gig so...