Get better at a strategy game I already play

Help me get better at a game I play. Game: [e.g. "chess", "Scrabble", "bridge", "poker for chips with friends", "Catan"] My current level: [e.g. "I know the rules but lose a lot", "online rating around 900"] How I usually lose: [what goes wrong - e.g. "I run out of good tiles", "I blunder pieces in the middle game"] Who I play against: [friends, family, online, a club] Time I can practice: [e.g. "20 minutes a day"] A recent game I can describe (optional): [moves, hands, or key moments] Give me: 1. The 3-5 most common mistakes players at my level make in this game, and which ones match what I described. 2. Core principles to focus on next, explained simply, with a concrete example each. 3. A 4-week practice plan with short daily drills I can do alone. 4. If I described a game, a review: 2-3 turning points, what I could have done instead, and why. 5. A pre-game checklist of 3-4 things to remember while playing. 6. Free ways to practice (puzzles, solo variants, online play) and how to tell I'm improving. Be honest about where your analysis is uncertain, especially for specific positions. For games played for real money, keep to strategy for fun play and don't encourage gambling.