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Anyone can forget a wallet once. If you lose/forget it twice, you need a system. "I arrive at work and put my wallet..." where? Wherever you can be counted on to put it, every time. Do whatever it takes to establish your new habit. Wear a red rubber band around the tip of your finger that will annoy the fuck out of you until you take it off, and don't take it off until you have put your wallet in its designated space. Do this until it becomes a habit.
For what was presented at the meeting, you need notes. That's what notes are for, to remember all the stuff that was said at the meeting.
There's a downside to this... if you ever suffer from sleep disturbances, you may find you have sleepdriven to your office and sleepplaced your wallet in the correct location. If that happens, at least you will be able to find your wallet.