Tips for losing weight?

I want to lose 15 pounds before August. I want to be attractive and this will get me one step closer. Please don't try to talk me out of it, tell me I'm beautiful the way I am, etc. I just need answers. I've tried to do it the healthy way. I would eat smaller portions, stop excessive snacking, etc but it didn't work. Please serious answers...
Tips for losing weight?
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