For instance, getting into the habit of introspecting your own thoughts the moment you realize you're awake -- you'll find that some of what seem like random things you're thinking about upon waking up are actually strands of whatever dream you were having in the last REM cycle before waking up, and if you practice pulling on those strands, you'll find that your recall improves over time.
There are also affirmations that can help. Literally telling yourself that you'll remember your dreams as you try and fall asleep, which implants a subconscious intent that helps create better recall.
I looked into this years ago when looking into inducing lucid dreams, and I can say from personal experience the various methods for getting more in touch with your dreams do work. It's just a question of whether you can be bothered to put in the effort and feel the reward is worth it.