dammnit

if you know me, you know i tend to butcher the english language. I'm pretty well read, and love my bartletts, and my dictionary. But dammnit all if i can EVER use the words capitol and capital correctly. I've been told many a time which is which but i just let my fingers type and i eff it up everytime. Capital is money, i know that, but thats about it. Anyone know any mnemonic devices?