I refuse to worry, or take myself too seriously.
I do like good beer, of course, and want to make it as good as I can -
so I do take sanitation and such seriously - but if I'm a few points off in my Sg I don't worry too much about it -
FG I haven't had much issue since I went all grain.
I haven't gotten too much into water treatments yet - maybe somewhere along the way.
I take a gravity at pitch, then near bottling / kegging.
Definintely not one to open every day to see how it's going - and taking gravities, therefore using a gallon or so along the way.