The best advice is to stop dieting.
Most people give up at your point because the results are harder and harder to see - your body is adjusting to your metabolic needs, and plateuing is really common. You have to battle through it and recognize that little losses (perhaps 0.5 lbs/2 weeks) are still accomplishments.
My previous company has a deep clinical pipeline of hormones that can be used to help weight loss. Basically, there are literally dozens of hormones in your body that all have a role in regulating your hunger, your fullness, etc. Only a few are on the market as Rx products (not for weight loss at this time), but clinical trials are underway to make them available when proven safe and effective.
At the end of the day, you really should invest in seeing a Dietician to help you with the latest clinical evidence regarding how to boost your metabolism with food, how to change your diet so you're more full (usually drinking a full glass of water before you eat + lots of fiber).
Simple things like putting your fork down between meals will help you slow down how quickly you eat. It takes your body 20 minutes for your brain to recognize that you're full - your stomach is also a muscle that will expand and contract allowing you to eat larger portions. Chew thoroughly, drink a sip of water before each bite, and learn which foods have more lasting power in your body to help you feel fuller longer so you avoid the temptation to eat.
Good luck - I'm not a dieting expert (I could lost 15 lbs myself), but these are tips I learned in 8 years of selling diabetes products like insulin, Byetta and Symlin to people with Type 2 diabetes who struggle with their weight as well.