Check out American Gunsmithing Institute (AGI). They have a lot of DVDs. Naturally, some are better than others.
But, there are some good instructional DVDs on long range hunting/shooting and cometition by Darrel Holland, David Tubbs, and others.
These are no substitute for practice and practical application. But, it's something to do when you get tired of surfing the Internet and can't get out to the range.
There's also a wealth of knowledge at a lot of the competitions. You'd think that everyone would be hush-hush. But, I think you'll find that most are willing to share.