Sennheiser HD 25-1 II £160
Headphones are the DJ's friend, as they'll be stuck to your ears for some time, it pays to have a good pair. The HD 25 1 IIs are light and comfy with an accurate sound.
Focusrite VRM Box £70
If your controller lacks a headphone output, try adding one to your laptop. The Focusrite VRM box is ideal for this but you could add a bigger interface for more options.
Korg Kaoss Pad Quad £230
Jazz up your DJ sets by throwing in some fancy effects. The Kaoss Pad Quad looks the biz, is easy to use and doesn't need to be routed through a mixer, unlike many effects boxes.
TDK 2-Speaker Boombox £400
Include a portable speaker in your set-up to make sure you're never short of an outlet for your tunes. TDK's Boombox has the looks and the power to soundtrack a house party, and even has a guitar input to let mates jam along.
Roland Edirol R-09 £265
Digitise any precious or rare vinyl you have by recording it to your laptop or, for better results, on a portable audio recorder like the Roland Edirol R-09.