Andrew:
I agree with Darius. You're off to a good start. It looks like you have your color schemes well picked out. I also know what you mean about blending. I'm still struggling with that. I have only been painting regularly now for less than 2 years.
I highly recommend the following website:
http://miniature-painting.net/links_painting.html
It has a good list of websites that are devoted whole or in part to miniature painting. Many of the sites have painting tips, some of which I have found useful. I have found Doctor Faust's Painting Clinic to be particularly helpful.
If I had one suggestion, I would say pick one technique (like drybrushing), concentrate on that, and get good with it over a series of painting sessions. Then, when you feel you have got that down, move on to another technique and concentrate on that. Trying to get the hang of multiple techniques on one figure can be exasperating (or maybe not for you, but that has been my experience).
One other trick I do: I noticed you mentioned that you forgot the dilution factor you used in painting a figure (Balrog?). I use a series of small notes (like stickies) or a small notebook and I write down what color/shade/dilution, etc. I use on each major portion of each figure I paint. 2 reasons: 1) If I want to paint a similar figure in the future like the one I am painting now, I can go to that note as a color reference rather than guessing, 2) If something goes wrong and I need to touch up or repaint the figure, again I don't have to guess what color or dilution I used. Saves aggravation later.
Good luck and keep on painting! Ultimately I think the best way to learn is just keep on painting!
Collin