If you find yourself between projects and have nothing to do, try searching for old microwave ovens in recycling bins or left along the side of the road.
Often, the only problem is a blown fuse due to cycling stress, or a broken door open microswitch. You can take a fuse or switch from another unit with a blown magnetron and bring it back to life. Check the power output with a glass of water. If suitable, you can take it to a local woman's shelter for abused mothers. You can often fix radios, tv's, telephones, and other simple appliances that would be needed by woman who have nothing for their kids.
I used to salvage dryers from a local appliance store. Often, the only problem was a broken door switch or a burned heater element. You can take the switch from another unit, or simply braze the heater with an oxy-propane torch.
These gifts are much appreciated by woman in the shelter. The look they give you when you bring them can melt your heart.