It is food, but sometimes I reward by getting foods that I usually consider too expensive (like organic raspberries) but which are also really healthy for me.
Or the reward of taking the time to cook yourself/your family a really nourishing meal that is great tasting and good for you.
An activity or outing with your kids - running around the park and feeling great with your family is a nice way to remind yourself why losing weight and being healthy is so important.
A bike ride in the sunshine! I love doing that.
A book on a blanket outside. Such a lovely way to relax.
A bath or a shower.
A pedicure or manicure (for yourself, not purchased).
Go for a hike with your family. Reconnecting with the woods can be lovely.
Dancing around the living room with VICTORY because you did it and you deserve to feel great.
Writing in a journal about your journey and your process.
Allowing yourself to feel proud, strong, capable. (This might be the biggest reward but sometimes the hardest).
(And monetary on this one but not like the other rewards): planning for something great! Perhaps you like to eat out too much and order bad food. Put the money you would spend there into a savings account. Buy lower cost, healthier food and when you get to a place in your journey where you have saved up money - use it for a night out, a spa, a mini-vacation. Have a big reward to look forward to!