When feeling discouraged, I always look at how far I've come. For example, "No, I can't run a 5k yet, but I ran 1/4 of a mile without stop the other day!" No matter how small the accomplishment is, it still makes you better than you were yesterday.
We kept a coin jar, but we'd roll coins and exchange it for cash immediately then spend it; no savings there. Now we wait to roll until the jar is at least 3/4 full, and it has to go in our savings account. Seeing a large amount helps us stay motivated.