In my novel, I go through the methods taught to me that worked so well, but I will summarize what little I know here.
Think of it like mental conditioning, like many other things which require an opening-repetition that lets you apply your willpower to the task. So to me it feels like a nice blend of passive and active: being receptive and actively seeking with the
intent of remembering.
You need a backdrop of enough restfulness/relaxation that you don't negatively "tint" in your dreams, so if you have the luxury of planning extra time for it, this can also help. Heh, I've found being too exhausted can actually have poor bleed-over effects on the dreams you *do* remember, and who wants to dream about being exhausted? Some try meditation or visualization exercises as a pre-dream preparation, but I have found that to be too excessive and don't want to risk coloring my dreams, so I just lie open and still, thinking only about calm and beauty (like a peaceful sunset), make sure all my muscles are relaxed, and then tell myself over and over, "I want to remember my dreams," until I am in dreamland or waking up. This tends to take a few days of consistency to work, but not always. I would practice this when I was doing self-exploration/research for my novel, and I'd end up very tired after runs of weeks of multiple dreams a night, and then have to "shut off the tap" to regain my restfulness. I think the balance is individual (up to you to figure out your perfect blend), but it's also not really that complicated as some make it out to be (the complication comes *once* you begin recalling dreams

).