Like Martakartus I prefer the old school way to journal. You have to slow down and think what you are writing. Often details I forgot come back to me while writing down. Mulling it over I think helps in several ways: Your subconscious realizes you are serious about lucid dreaming. You often pick out dream signs while journalling. Sometimes you realize where that dream came from (the events in RL that triggered it). You come to understand the need or desire you have that the dream symbolized for you. Maybe you can get that with other methods, but this works for me.