Finding the right stock for your woodworking project can be a little intimidating when you’re just starting out. Fine WoodWorking’s website features a few videos that’ll arm you with the lingo and information you need for wood selection — they also tell you where to find it.
They contain some good tips, like what S4S means, and why you’d want that, and how to deal with the folks at the lumberyard. One thing they don’t say in the video: You should always remember you’re not the only picky woodcrafter these guys have seen. Don’t be afraid to yank out every board you come across and inspect it. No one expects you to pay for badly warped or cracked boards.
Getting Started In Woodworking: Lumber Selection [Fine WoodWorking]