How can I "permanently" straighten my hair at home?

I have fine-frizzy-curly hair and and I'm sick of spending the time to flat-iron it, especially since it's summer and I'm busy. I'd like to find a way to keep it straight for at least a month, but I don't want to damage my hair. Is there anything I can do at home that won't kill my hair but will keep it straight (or at least straighter and not frizzy)? Also, what are the pros/cons to chemically straightening your hair at home?