Dr Straw has a series of lessons on counting (linked at senseis
http://senseis.xmp.net/?SteveFawthrop%2FCounting).
I as usual took a shallow dive in order to skim the cream (or maybe just the dead fish) off the top. I've been using his suggested method of counting by pairs and rounding up to 50 to judge where I am in the game - it's been pretty good so far - but I need to count more and more deliberately (at the moment I see that I have a couple of minutes left, or that my opponent is counting, and so I count - I dont stop to count as part of my game)
Dr. Straw also has more on the value of solid versus potential territory and how to estimate the difference- but for now rather than eat the whole elephant I've been working on one thing - just counting in the first place.
I seem to recall that Clausius (sp?) also has a couple of you tube intro lectures on counting and territory.
I saw your post about how to estimate the value of a move- that I suspect come naturally with dan-dom. One quick thing that can help if you are short on time is just to estimate the relative size of your territory (group x ~ size of group y+z etc). Even if you cant count exactly this can let you gauge where you stand.