I will give you my personal analysis tree, I have found it works wonders. I follow this list before each move I make in general. The list should be followed in order. Don't deviate.
Defence:
1. What was my opponent's move?
2. Why did he make this move?
a) Does it threaten anything?
b) Does it increase pressure anywhere?
c) Are there any checks or forcing moves available now to them?
d) Do I need to defend?
Offense:
3. Are there any checks available to me?
4. Can I capture any pieces?
5. Can I threaten any pieces?
Positional:
6. Rooks - Are there any files that can be opened?
- Can I move a Rook to a more active file?
7. Knights - How can I improve their position?
- Can I restrict my opponent's Knights?
8. Bishops - How can I improve their position?
- Can I restrict my opponent's Bishops?
Analysis:
9. Review prospective move list
- Check for opponent responses
10. Select Move
- Check again for opponents responses
Besides Think Like a Grandmaster, which is a bit advanced, is there another book that discusses organizing your "tree of analysis" into something more manageable by players under 1800?