more about assessing a position

The mnemonic is K-Map.  Look at king safety, material differences, the activity of the pieces and pawn structure to discover your opponent's and your own strengths and weaknesses.  I'm poor at assessing the activity of pieces and tend to overlook hanging or restricted pieces. 

The other mnemonic is SWOT - strengths weaknesses, opportunities, threats.  Be aware of tactical opportunities which are not necessarily immediately forcing.