A useful tip that has always helped me is to try to sneak in some refreshers or studying in spare time when I might not be doing anything else. For example, I might run through some material while I'm in the shower/bathroom, waiting in line, or riding the bus. That way you can keep up on your knowledge without wasting valuable time. Plus, such moments are usually only a few minutes so it's not overwhelming or an entire process that might seem too tedious. Additionally, it naturally lends itself well to chunking, where you break the larger batch of knowledge up into smaller pieces that you can practice by themselves, which often (at least in my case) helps me remember them better anyways! Hope this helps!