Do use Heirloom seeds-and not hybrids. You can then save the seeds for the next year. Share with friends too. Google heirloom seeds or heirloom tomatoes-fun finds! Seedsavers.org is good too.
i have 2 raised beds and love them. make sure you rotate where you plant things, especially plants prone to virus diseases like tomatoes.
i used tomato cages as a support for sugar snap peas. just planted peas in a circle around the cages.
herbs, peppers, cauliflower