Have a professionally set-up bass
One luxury of being in a professional band is having a tech who will set up your bass, intonate it, and make sure it’s in fighting form. Changing strings is a basic task you should be able to handle, but unless you want to practise setting the action by watching Youtube videos, I suggest finding someone who does this professionally.
On our first major album, Ascendancy, we tracked guitars for about one week before we realised that it was all slightly out of tune. The issue was the original tuning we tried, and the guitars not sitting well in it, but it just goes to show how you can lose time very quickly with small issues in the studio. You should become obsessive- compulsive with your tuning while you record, so make it a habit while you rehearse.
Small, annoying bits of kit
Cables are like socks – they disappear easily and you never seem to have enough. Batteries? This should be self explanatory. Guitar cleaning materials like neck conditioner, cloths, string cleaners and so on are a matter of preference and hygiene, but I like the body of my bass to be clean and the neck to be conditioned throughout the sessions. Dunlop has a few great maintenance kits that should last you a while. Get a metronome too. There is nothing like practising with one of these, and it will help you warm up at intervals and really lock in your playing.
Bring your ‘A’ game.
There is no excuse not to have the riffs learned and the parts burned into your mind. Most importantly, be well rested. After a long year and half of touring, going into the album prepared and with a clear mind is crucial. We have a small window to get the finishing touches done to the songs before recording, which itself will only last a few weeks. You have no choice but to be ready to get in and do the job. We have already been told by our producer to expect 11am to 11pm schedules most days. Sleep, and be ready to contribute.