Being a temp worker isn’t easy. Running from job to job — walking dogs, delivering food, or Ubering people around — is exhausting, and it takes a chunk out of your free time. Did you also know it’s taking a toll on your wallet? Going from one job to another, it might be easier to pick up a meal than it is to cook, or you might drop off your laundry rather than do it yourself.

It’s called convenience spending, and it’s a danger to your bank account — the one you’re trying to fatten up with ext…