Don't put too many chemicals on your hair, it will become very dry at the ends and break. If you have just had a perm and it is too tight and curly, it should drop a little in a few days, otherwise use large rollers to straighten and smooth it - unfortunately straighteners will dry it out as well. Use plenty of conditioning treatments on the ends, if it is long you can have the ends cut off as much as possible, otherwise you will have to wait until it grows out - just keep using the rollers!