I removed caps lock and changed it to a layer modifier. Then I mapped symbols and arrows to the home row on the second layer (in fact, numbers too).

caps + a => !, caps + s => @, etc. Brackets and underscores are extremely convenient to have on the home row. I also have these mapped to convenient positions "=>" and "() => {}"

Finally, I have arrows mapped to u, i, o, and p. Really, really nice for hopping one or two characters without having to shift my hands too far.