Stop saying you've tried everything and can't gain weight. When I hear someone say this, I start asking a few simple questions and it's very evident that they have in fact NOT tried everything. In fact, as someone who has gained over 40 pounds, most people aren't trying at all. Here is the mindset you need, the brutal honesty and some tips and tricks to finally gain weight! Gaining weight is not easy. I commonly hear people struggling and they swear they are eating a lot.