I rely quite often on JB Weld and 2-part Epoxy for fixes around the house. In some cases, soldering works for a fix. Duct tape and WD 40 are standard repair items as well. I also keep a stash of shrink tubing around - it's great not only for electrical repairs/splices, but for fixing other things too. Beyond that, an assortment of all types of nuts, bolts, washers (regular and fender style) as well as a drill and tap set, I'm set to fix a variety of things. About the only thing I don't have available is a welder, which I may add at some point.