Jeans SHOULDNT be washed. Levi's say that on them.
I wash mine on cool, after a lot of wear, if I've worn them to work it'll usually be a week (can be a manual job at times) otherwise....they get folded and put back in the drawer until they go baggy then a cool wash.
Shirts, unfortunately usually once a wear, just because you know...pits haha. But as soon as I find a half decent anti perspirsant that works I'll cut that.
Pants, one use before washing obviously.
Tops, as and when they get / look dirty/smelly
I always look smart and presentable.
Blazers/jackets....god, once a year?
Towels, once a week unless someone has toothpasted on them.
Flannels, well I have 7. So once a week they all go in.
Bedding once a week/ten days.
My house always looks and smells fresh and clean, but I don't use harsh chemicals really.