There are all kinds of things you can do to reward yourself.
Treat yourself to something - manicure, massage, pampering day, new hairstyle, something like that. Whatever floats your boat and makes you feel good I guess.
Also, I usually buy myself something small in between, something that I don't necessarily need, but maybe had an eye on. Like jewellery or shoes or something. Clothes always work for me, but then again, I didn't have much because I didn't get out a lot, so I actually 'need' clothes anyway. *lol*
Also depends on what your hobbies and interestest are of course. My ultimate reward, if I ever make it to my
goal, will be to go skydiving for example, but that might not be everybody's cup of tea. *lol*