Are there any memory "hacks" I can use to stimulate my brain?

I guess I’m looking for tests/games that, at the very least, stimulate my memory, and ideally make my mind more “receptive” to new ideas/concepts. I’m trying to jolt my brain into (getting in the habit of) remembering things, so maybe some of you students out there have some ideas? I’‘m open to any and all suggestions. I’ve seen brain-trainer books floating around; do those help?