Move all your bills onto the card.
Prepay your large bills — life insurance, homeowners insurance, car insurance. See if you can prepay your property taxes. Whenever they're due, just call up the company and pay them now.
In my town, you can also prepay your utilities. So if you don't mind having $1000+ "in limbo" rather than in investments — it really wouldn't be much of a hit — just prepay your utilities by $1000 or $2000.
Go out for drinks/dinner with friends, and have them give you cash and put the whole tab on the card. You can buy something minimally expensive. That way you can get something like $100+ on the card for a real spend of $5, if you play it right.