Re: Tin foil
I'm a big fan of the 500-pack of small sheets of foil you can get at Sam's Club. They also make small (about 11" x 11") sheets of wax paper in a box. They're very convenient, and I seldom need to use either product from the roll.
Re: Small, portable ovens
I have also always loved toaster ovens, as their heat-up time is much less than conventional ovens (I suspect a full-size gas oven would take less time to heat up than an electric oven, but they are very uncommon and I have no basis for comparison). Anyway, three years later, my $30 Wal-Mart special toaster oven is looking a little worse for wear, due in part to my roommates' use of it, so I'll be leaving it here and looking into the Panasonic when I get a place of my own.