My dad has over 20 raised beds now they really are great! They work well for things you wouldn't want a garden length row of, and when you don't have a really good large garden spot. (He doesn't) Dad also likes the Square Foot Gardner & Organic Gardening magazine. He uses a lot of grass clippings as mulch.
I only have two, they are my strawberry beds. It makes weeding so much easier.

I will get more as time progresses, however I have a good spot for my garden so full rows will stay in it!
Another thing my Dad introduced me to is using concrete reinforcing wire to make tomato cages. Use the full height, the plant will fill it & yield greatly provided the pests stay away!
I prefer to think of my garden as evolving. Good luck & enjoy it!