A clear reason gives a decision something sturdier than the mood that first suggested it.

Moods start good decisions and cannot hold them. Something feels right at eleven at night, and by Wednesday the feeling has moved on while the commitment remains with nothing underneath it. A reason you can say out loud survives the change in weather, because it can be checked, revisited and defended to yourself. Feelings are useful for noticing and poor at carrying weight.

When you decide something this week, write one sentence saying why. Keep it where you will find it once the enthusiasm has drained. If you cannot write that sentence, it is better to know before committing than after.