Take notes during meetings

It's quite normal to take notes during meetings of organisations and official meetings.
But taking notes at less planned meetings is often forgotten.

Keep a small notebook and a pen in your pocket and whenever someone who forgets his appointments and agreements tells you something, write it down.

At the end of the conversation you can repeat what is written and ask the person if he or she agrees.
It's a great way to remember things and to be able to tell people they have to stick to what they've said.