Brands is an ace circuit, if it's your first go on one you'll spend most of it learning to use all the road. I'd say make sure your tyres are ok and pressure's right, I believe they should be a bit less psi for proper track use as they will be running hotter so the air expands, I'd imagine someone on here'd know what to run them at all depends how fast you aim to be going tho'. And brakes should be in top nick too, if you've the funds/time some new pads and fluid in the front if they've not been done for a while, SBS pads, are fab' I think.....
Just go out an enjoy it, it's addictive tho'