I would start by activating a nice piece of clear quartz specifically for this purpose. I'd choose a piece of quartz with one natural point (not a tumble or a cluster).
Quartz amplifies energy so asking the quartz to help you remember your dreams is asking it to do something very natural -- amplify the energy of the dream so it lasts longer after you wake up.
I'd expect you to get good results if, after activating it specifically for the purpose, you hold the quartz while laying in bed just before sleep and repeat several times "I will remember my dreams when I wake." Then put the quartz beside your bed, on top of an open notebook, with a pen nearby!
Good luck, I'd love to hear how it works out for you!