How often do you journal?

I'm curious on how often everyone writes about something. Do you do it the moment you have a serious thought in mind, or by the end of the day and just have one entry for the day? It feels like there is always something going on in my mind that I need to make a list of what I want to express to my journal but the moment I sit down to write, everything juggles up and I end up writing less about my emotions. Any recommendations or advice on my part?