Yeah, I think that's another instance in which a Kill-A-Watt would be handy!
A GFCI sounds like a good idea, too. I don't have any GFCI outlets in my house, though...there should probably be one next to my bathroom sink and in my kitchen on the same counter of the sink, though. Another code violation (I'm sure there's a few) at my house...
I like the idea of current monitoring, though! It's also nice knowing what things SHOULD draw, for example a vintage 2XF40T12 shoplight with a .8 amp ballast should draw around 96 watts; a 175w MV yardlight should draw about 210 watts, etc.