If you are winning, you must attack to maintain your advantage. If you are behind, look for ways to defend or create a counter-attack.
Determine who has the "edge" based on material, piece activity, and pawn structure. Thinking In Chess A How To Guide 7z 007
Instead of picking the first move that looks "okay," identify 2–3 reasonable options. Briefly calculate the variations for each before deciding. 3. Practical Calculation Tips If you are winning, you must attack to
Good players think in mini-strategies rather than single moves. Instead of picking the first move that looks
Before a game, manage your nerves and focus on the current match rather than dwelling on past losses.
Ask "Why did they make that move?". What are they threatening now that they weren't before?.
Ensure your king is safe and you have no "loose" (undefended) pieces. 2. Formulating a Plan