you have to catch a dream before you lose it to get started, but once you get into the habit of writing down your dreams and bodily awareness when you’re awake (pinching yourself to see if it’s real, for example - in a dream your fingers will pass right through the skin) you may gain better memory upon waking. lots of people say to write them in a physical journal, but i just have a notes app page going with several years worth of dreams. here are some silly ones from recently