Hey Greg, A great start is Gaia's Garden by Toby Hemenway. You can also watch some free videos by Geoff Lawton on youtube or his website. A lot will depend on your location/climate and your goals. If you share that, I'm sure people could help you out even more.
This will take every ounce of my mental strength! All for a tiny ad:
permaculture thorns, A Book About Trying to Build Permaculture Community - draft eBook