1 Move Checkmate Puzzles
As checkmating your opponent is what is usually required of you to win a game, it's important that you can spot how to actually checkmate your opponent. Recognizing checkmate patterns is important to improve as a player.
When solving these you want to visualize moves before you play them. Do not 'drag' pieces until you know what you actually want to do. As for thought process, in some positions you will instantly see the winning move, in which case you simply play it. Other positions you may have to think 'well when I check him with Re8 check, does his king have anywhere to escape to or is it checkmate' and if you see his opponent has somewhere to escape to, then you look for other possible checks that may lead to mate.