It is always nice when some unexpected, or almost forgotten funds come your way. The trick is to not let it burn a hole in your pocket. I find that in cases like this, the faster the better. Deposit the money fast! Do not pass Go. Do not collect $200.
When little snowflakes come in, spend them on paper first. Decide what bill needs to be paid, which savings account can be boosted -- or even a little of both. The quicker you decide on a place for the funds, the less likely you will be to spend the funds on other things.
What do you do with unexpected funds? Treat yourself? Save? Both?