Thanks for you post, Revenant! What a scary thought, imagining all those sharks around...

To answer some of your question, the best thing I can recommend (unless you already know it) is to read, methodically, Dan's Novice Nook article on ChessCafe:
http://home.comcast.net/~danheisman/Articles/Novice_Nook_Links.htmI recently started, from the first article he published back in 2001, and I do believe there are pearls of wisdom in each article: really practical things about how to improve, do's and dont's.
I know there are so much stuff out there that we can read everything, but I would check them out...
Cheers, and thanks again for your post!
Andrea