As above really mate, suitable clothing for the weather, bit of grub and a drink. Use clothing that is waterproof, but also does,nt make a lot of noise when moving about. Staying warm is half the battle if static hunting, or having a mooch, as you are not really moving about a lot to keep you warm. I always take a moby phone and a compact first aid kit, as its easy to nick yourself on barbwire fences etc.