as the other posters said, be thorough, and make sure you meet all of your insurance requirements, but no need to do more.....it's already a lot to begin with. Even if your insurance or doctor does not require it, join a program or support group BEFORE your surgery to help prepare yourself mentally and physically. And again along the lines of hunger, everyone is different, but until you get to the proper restriction you will still have hunger. For me it took 5 months to get there. Don't get caught up in the amount of time things take, you will make yourself crazy. it's a process, and it takes as long as it takes....but it will change your life forever!