If you want to remember your dreams, a dream journal is the way to go. However, if you have trouble recounting your dreams as you're writing, try writing in present tense, like it's a story that's happening to you right now.
Photo by rhonda_jenkins.
A therapist friend suggested this tip when I complained about not being able to remember a dream. She pointed out that writing in present tense helps you better jog your memory and relive the experience of your dream. I tried it for a few nights, and it works surprisingly well. Of course, it also helps to write as soon after waking up as possible.
If you take notes about your dreams, give it a try next time you're writing.