Rob, what several friends of mine are doing are "reward jars" where for each day/time they do something they are supposed to do they pay themselves a set amount. You can do something like that and use it to fund your class you want. Each day you don't start a new project should be worth a dollar. Each time you work on something, another dollar.
Make a fancy jar and the price list for rewards and place it in a conspicuous place, whether that is in your sewing room or next to your coffee pot or whatever! The thing is to have a concrete reminder of what we are doing and why.