I don't know exactly where you are, but here's the beginnings of a guide I want to write sometime soon to learning Go from the beginning:

Start with The Interactive Way To Go.

After IWTG, the next step is to make doubly sure that you're really, really clear on the following basic game mechanics: eyes, false eyes, and Japanese scoring (i.e. you understand how playing inside your territory costs you point(s) and how removing already-dead stone(s) by filling their liberties doesn't otherwise affect the score except that playing inside your territory costs you point(s)).

Then, two brief items:

• Vital life-and-death points and killing shapes
  
  Hane, Cut, Placement is a proverb about where to play to kill. "First, consider the hane. Next, consider the cut. Then, consider the placement." But before you consider the hane it goes without saying that you should recognize when there is an obvious placement i.e. a vital point i.e. the only place to partition the eyespace, where if you play then your opponent won't be able to partition.
  
  
• Beginner's Mistakes (mostly regarding the edge of the board)
  EDIT: see also Preventing escape on the first line

Next, I would call the areas of focus Life & Death, Basic Instinct, and Strategy:

• Life & Death
  
  Do tsumego to train reading. Five tsumego once a day is more effective than a hundred once a week.
  
  In addition to being a heuristic while reading, Hane, Cut, Placement also describes how to play when you can't read it all out. The orthodox way to kill is to reduce the eyespace until there is a single vital point. Hane is most common way to reduce eyespace. If there are defects in the defender's boundary stones, cutting may result in a fatal reduction. As for placement, even when there's more than one potential point for partition, a placement at one such point may simultaneously threaten to occupy the remaining potential partition point and also threaten to connect out (or falsify a potential eye by crosscutting, or w/e).
  
  
• Some basic instincts; some basic two-color shapes
  
  Unfortunately I've found no such article on one-color shapes that's short enough to recommend, so I'll make a few remarks here. I'll restrict myself to three-stone shapes.
  
  This is the empty triangle, which is inefficient and usually bad:
  
  If a white stone is on the marked point, it's not the empty triangle and the proverb doesn't apply. If a black stone is on the marked point, it's even more inefficient and bad. See the linked page for more about the empty triangle.
  
  Here are some standard, efficient shapes to pay attention to and experiment with:
  
  *Not a widespread term.
  **Not a widespread term; unrelated to the tripod group!
  ***Not sure if widespread term.
  
  
• Strategy: Shygost's Three Questions