I found that writing down 5 things to do a day that you want to accomplish (not that you need to) helps to keep me motivated. After you cross them off, it gives you a sense of accomplishment for that day.

I also aim to do something nice for someone everyday. It could be something small like opening the door for a mother with a stroller or something big like buying a gift card and giving it to the person in line behind you in the grocery store.