There are all kinds of different tomato varieties out there. I think it is important to find out which grows well in your area that is the type you want for your purposes. I grow a lot of different types but I have a lot of different purposes. I can tomatoes, tomato paste, pizza sauce, tomato puree, and vegetable soup mixes. I slice tomatoes for sandwiches, eat them on salads, chop fresh ones to cook with, or just pick them to eat fresh from the garden. I grow mostly indeterminate but will have Sweet Tangerine and Rutgers (thanks, BrokeDownRanch) in my mix. I grow red, yellow, black, purple, and occasionally orange. I grow paste, plum, slicers, beefsteaks cherries, juicers, a wide variety. They all can well and make good sauce, but yes they have different qualities and consistencies.
My determinates do not all totally produce only one time but will continue producing, just not as prolifically. I find it beneficial to stake my determinates for a couple of reasons, both due to disease. If you stake them, they can breathe a little better at ground level, letting them dry out so they are not as disease prone. Getting them up of the ground also reduces the chance that they will get the blight. (I also heavily, strongly, emphatically believe in mulching to keep the rain from splashing blight spores up on the plants. I probably should emphasize the mulching more. Oh, well.) I do not prune the determinates but do the indeterminates. Different growth habit. Different people do different things.
I use two versions of Pat's freezer method. I wash and let dry all the tomatoes that I am going to freeze. The "perfect" ones I put in zip lock bags and freeze them. When I thaw them out to use, the skin slips off extremely easily. However, for the "not perfect" ones, the ones that have flaws I do not want to go into whatever I am canning or cooking, I cut out the flaws, including the stem end, put them in the zip locks, and freeze them. When they thaw, they are so soft and mushy I cannot remove the flaws orth eskin off these. For the ones I cut up before freezing, I always use these for sauce or puree, something that goes through the food mill. I can remove most of the skins while cooking them (they tend to separate and float to the top and I'm stirring it a lot to keep it from sticking anyway) and the rest come out in the food mill.
We all do things differently for different reasons. Just thought I'd share some of mine. My ways are not necessarily any more right than anybody else's. They are just the way I do it.
Good luck. Experiment and have fun!!!