What is a quick way to lose 30 lbs asap?

I cannot do Atkins anymore, and I am not looking to be "buff" just my normal weight, which is 30 lbs back there somewhere. What have you tried or done where you could lose that amount of weight in a short time? I am a 39 year old female, 5'1'' 160 lbs. I look good at 130....please advise. Thank you.