Can't apply strategical knowledge in tournament games I'm currently in a tournament and I'm losing terribly. The problem is that I never implement the strategic things I learned in books (reassess your chess, my system, etc...) 

I just calculate some random moves and hope my opponent blunders which he never does. Because of that I drew a game against a much lower rated person than me. 

Also, I often overlook 2-move tactics that win a pawn. 

Should I create a checklist of things to look at for every move? What could this checklist contain? 

When I'm playing on lichess.org (blitz), I suddenly know everything and apply all of those things. I suspect, that I'm irrationally afraid of certain moves and then try to counter those moves.
Thinking Techniques that I give my students:


What new threat(s) has my opponent's last move created?  How can I answer it?(them?)
Is my King safe?  Is my opponent threatening to checkmate me in the next few moves?  Can I checkmate my opponent?
What threats can I set up?  How?
Have I seen this position, or a similar one before?
If so:  who stands better, and what is the best plan for continuing?
If not:  what are the outstanding features and elements of this position, and what plan(s) and method(s) of achieving it are available?
What is my play?  What specific position would I like to obtain?  How can I achieve my goal?  How can I improve my position?
How many good moves do I have?  Which one is best?  Can I capture material without penalty?  Can I develop a piece?  Can I employ any of the following tactical devices:  pin, fork, skewer, discovered attack, double attack, trap a piece, double check, etc.?
Is it safe to move my piece to the square I'm thinking about?  (Blunder check.)
Did I remember to start my opponent's clock and write down my move.


Notice that there is no mention of the positional elements.  Beginners should be more concerned with the tactical side and how to develop plans.  Strategic plans are formed based upon the position.  By studying games which have similar positions and learning how the masters continued should help you with strategic plans.
There is also plans which can be applied to completely different openings.  A knight sacrifice on f5 can be used in both the closed Benoni system and the open Dragon Sicilian.  By studying good annotated games, I mean the author saying in a simple language what (s)he is thinking, not pages of computer analysis, you will find great insight.