Retain Your Good Ideas

The other night I must have been very creative because I woke up four times, each time with a new, what seemed to be, brilliant idea. The thought appeared so clear to my mind I thought I would never lose it again and I fell back to sleep. When I woke up later in the morning, I had lost all four ideas. It is a good idea to have a pad and pen by the bed to be able to catch the idea immediately when you get it. I will equip my bedroom tonight. What do you do to retain your good ideas?