Just a brief response to your post, I'm sure others will have lots to say.
Try reading The Amateur's Mind by Jeremy Silman. I think it really helps the beginner/amateur understand what they're doing wrong, and changes the way you think about positions.
In mid-Feburary I decided that I wanted to become a decent chess player. Beforehand I knew the rules, played a decent amount when I was a child (I'm 25), and had played on facebook and yahoo from time-to-time.
I am enjoying it greatly, but I am a person who is driven by progression.
Since then I have read:
-Chess for Dummies.
-Yasser Seirawan's "Winning Chess" Series. Most of them. I skipped Openings and Brilliancies for now.
- Bruce Pandolfini's Weapons of Chess, Complete Guide to Chess
- Ward Farnsworth's Predator At The Chessboard
- Some book by Susan Polgar on tactics
- The Majority of Dan Heisman's Novice Nook Articles
I have also done:
-All of the tutorials on Chessmaster 11
-9 hours training on Chess Mentor
-About 1000 tactics puzzles
I have played:
-~70 correspondence games.
- 100 ICC games (20 of which were non-blitz)
- 3 USCF games
- Several games vs the Shredder and Chessmaster engines
Yet, I am not seeing a significant increase in my skill and am still not able to consistantly play over 1200 strength (don't mind my rating here -- I just started playing here (came because of chess mentor), and my only game has been against a guy who didn't know it was correspondence, and quit on me).
I understand that improvement is a result of not only hard work but also time and experience, and I am not expecting to become an 1800 overnight. But I would like to at least see a little bit of progress.
There was a moment of epiphany when I read Dan Heisman's concept of "real chess" versus "hope chess" (I definitely can be accused of playing hope chess, and I have gotten a lot better at it but I still do it often unfortunately). But it hasn't had any effect on results.
One thing that I notice is that I play OTB G/60 and no matter the result of the game (and I have had some come down to mindnumbing bishop and knight endgames), I have always had 40 minutes or more left on my clock! I try to slow down, but at my rating level, most of the people in my club who I am paired against are young scholastic players who are moving just as fast as they can move their arms, and I find it very, very hard to slow down. I also move very fast (about 1 minute per move) on correspondence games online! This is a clear weakness and something that I have been trying to address but I have been unable to resolve completely. I have decided to completely stop playing blitz until this is fully taken care of and I am playing "real chess" every move.
After I slow down, what am I missing next? I have neglected openings completely, playing on principles rather than memorization. I feel that at my level, this is the right thing for now.
Do I just need to grind out several hundred games for now or what?
Do I need to hire an instructor? Is chess mentor not enough?