Asking for help

I'm not one to ask for help; but my way obviously isn't working.

Since graduating from college in May 2008, I have consistent been putting on weight. I exercise regularly (3-4 times a week) and still can't lose. I have bad habits; such as eating dinner at 930 when my husband comes home from work or the occasional pig out.

I was thinking of joining a program; Weight Watchers or something along those lines; via online of course. I was going to join a gym, but working at a school, I have our school's weight room and machines to use for free so it seems silly to waste money on a gym when I can go for free.

What are you doing that works? What advice can you give me? Has a program like WW or something similar worked or failed? How do you stay slim and trim without crazy crash diets or starvation?!?

xxAmy