My experience is that major weight loss is as much (or more) of a mind game than a body game.
it helped me to set a goal and then put my head down, and charge to it ... And not let myself get distracted by anything.
i planned meals, I made sacrifices by not eating foods or drinks that were not on my plan, I exercised and I put my needs first.
i kept up with my surgeon and all appointments even if they were just to stop in and get weighed and 'show up'
i went back to weigh****chers for accountability
i see a lot of people who lose some or most of their weight ... And get distracted by life and go back to old habits ...... They start to regain before ever achieving their original goal. I knew that I would have been very discouraged by that, so I just kept pushing untilI reached my goal.
after that, I focused on changing my appearance through plastic surgery and that cements my commitment even further.
Best of luck to you as you begin this great adventure.