Think about the last time you tried to make a plan. Did it work? Was it great? Or did it turn into a big disaster?
When our plans do not turn out the way we want them to, we have to go back to the drawing board, and start planning all over again.
For example, let's say you were planning a big birthday party for your friend. You had music, games, and gifts all planned out. But then your friend tells you one day, "I hate surprises." So sad.
Well, I guess we'd have to go back to the drawing board if we want to figure out how to celebrate their birthday XD.