What do you do after the PPL?
There's LOADS to do. Find someone else to fly with - half the cost, half the work, twice the fun. If that's difficult at your school/club, try another one. Fly to new airfields. Try flying something new - helicopters, microlights, taildraggers, gliders, gyroplanes - just for the hell of it and because all new flying experience is useful. Go to fly-ins, aviation events, the PFA Rally, talk to people and find out what else you can do and who you can do it with. Try the Dawn to Dusk, the Malta Air Rally, or any other competition you can find. Watch air racing and find out about taking part. Try aeros. Do the IMC; even if you don't want to use it, all experience is good. When you go on holiday, hire an aircraft and instructor for an hour, just to see a new area. Look into buying a share in an aircraft; it may not cost as much as you think.
I'm sure there are a few more if I think for a while.