I have been doing the 52 week savings challenge and I have been saving mine in an envelope. Every time I go to the store and use my debit card I get back $3 and add that to my pile until I reach my goal for the week. I had so many dollar bills that I had to exchange it for bigger ones. Right now a few of my coworkers are still in it with me and I came up with the idea of taking a pic of our progress at week 26. I did it and it felt great so now I took a 29 week pic. I think I'm going to take pics once a month for motivation.
If you haven't started, it's not too late. Just write on an envelope week 1, week 2, week 3 all the way through 52 and put a check next to it when you deposit money. So if today you have an extra $10, check off week 10. If you have an extra $1 check off week 1, extra $6 check off week $6. Etc At the end of the year you'll have close to $1400.