I'm baa-ack! I was having trouble logging in (obviously all OK now) but I was feeling a bit silly because I don't know how to clear my cache and cookies

. (I'm not very computer savvy.) Can someone please tell me how so I'll know for next time? This thread might also help out anyone else who is having trouble logging in because they're computer illiterate like me
I'm using Internet Explorer if that's of any significance. I tried searching the help options but of course it's useless (as always).
Thanks in advance