I haven’t tried it myself too often, but supposedly focused thought on your sleep and any possibly dream imagery is best immediately after waking, you’ll notice you can pick details out of dreams after if you make a conscious effort to take some time, stop and remember a little bit.

I rarely remember more than a handful of details of dreams throughout an entire year, but if I make an effort, it does seem to come easier.

I'd try: read about dreams, regularly talk to people about dreams, think about dreams when falling asleep and waking up.