A DJ who is in control when hit with any surprises — tech issues, shifting crowds — is the one who did the boring work earlier. Track prep is what lets you mix on instinct instead of scrambling, because when the floor's moving and you're deciding what's next, you don't want to be squinting at a waveform working out where the breakdown is. Get your library ready at home and you free yourself up to actually read the room live.

Start with your beat grids, because everything else depends on them. If the grid is off, your loops drift, your cues land in the wrong place, and sync fights you all night. Go through your key tracks and check the grid actually lines up with the transients — dance music is usually solid, but anything with live drums, tempo changes or a loose feel needs a manual check and correction. It's tedious, but a track with a wrong grid will let you down at the worst moment, and fixing it live is nearly impossible.

Then set your cue points and loops with intention. Mark the sections you'll actually use — a clean intro for mixing in, the first drop, the breakdown, the vocal, a solid outro for mixing out — and colour-code them so a glance tells you what's what. Set loops at the points where you might need to extend a build or stretch an intro to buy yourself time on a transition. The goal isn't to prep every track to death; it's to make sure the tracks you're likely to reach for are ready to go the second you need them. Do this the night before, not in the taxi, and you walk into the booth able to focus on the only thing that matters live — the room in front of you.