I set my fit points to be used if I run out of weeklies, which only has happened twice. Since you can only use up to 4 weeklies per day it isn't like you are giving up that much, but it does help if your spouse makes your favorite meal for dinner. No you cannot turn your fit points off, but they don't count against you so it really doesn't matter. Also many think you can use your fit points to increase your daily points, but that isn't how WW works. You start with so many dailies, and as you lose your daily points decrease. You can have 4 points roll over from the previous day, and you can also use up to 4 weeklies in-addition to your dailies per day. That is the gist of it, some like to use fit points instead of weeklies, or a combination of the two, but I see them the same, and have found using them if I run out of weeklies works best for me. Whether you use them or not, is solely up to you.