Seed saving for next year

This year I am trying to economise. Seed for the garden actually costs a lot. Still cheaper than buying plants but I do go through a good bit of seed. For the last couple of years I have saved tomato seed from my mother, which came from my uncle, which came from my granddad. It has worked well. This year I have saved berlotti beans, lettuce, the tomatoes seeds you see (no longer just one type) and am waiting for my current climbing beans to set seed. Not prolific yet but starting.