I dont stake my tomatoes, they grow against a wall and I suspend ropes from the top of the wall and just give the plant a twist around every week or so.
I was reading a garden magazine the other day that made the point that tomatoes are actually perennials, so after pruning back, I left a couple in over our (relatively mild) winter and they have continued to flower and fruit, albeit slowly.
I think that growing new plants every year is probably the way to go for good production though.
Green tomato relish is a good use for those fruit that fail to ripen before you rip the plants out.
There is nothing quite like the taste of a good home grown tomato with the warmth of the sun still on it!
Time spent in a garden is never wasted.