I keep remembering all these things that I used to do....

COLD SHOWERS! I'd have 2 or 3 cold showers in a day and just stay slightly damp to keep cool...it was a life saver!

Another suggestion - if you're able, cruise the shops, or find a nice cafe to sit in that's cool - that way you're not stuck at home and it's not YOUR a/c that's running up the power bill!!