Help with small sewing/mending projects! Sweaters and t-shirts with seam rips.

I detest sewing by hand, and don't have or want a sewing machine, but I also hate the idea of tossing a perfectly good t-shirt or sweater because of a small seam rip. Help me with my mending pile, please! I have some basic thread, and will buy any that's needed. I have some hand-sewing needles, but you'll probably want to use your own, I'd guess.