Also never give up. If you bombed your front nine, never never give up. I've turned potential terrible rounds into great rounds by never giving up. Always stay positive and your mental thoughts shouldnt be "dont hit it in the lake", but it should be "I
am
going to hit the green". Over every putt say to yourself " I
am
going to make this putt". Self confidence is huge. Take deep breaths and stay as calm and positive as possible on every shot. Trust me, I play roughly 15 tournaments a year. Also, the more tournaments you play, the better you will be at handling the pressure. I hope this helps and good luck in your club championship.