an extra set of wheels helps and they don't have to be extra light/aero or anything, just extra. If you're smart with your training a pen and paper will help you improve although not as much as a meter but that's a luxury item right now and of course, race! If you have a club around join that too, you'll get good advice and a lot of those guys will probably be upgrading equipment so you can have first dibs on their hand me downs.
Good luck.