Another strategy that I've often used is to just fix a few bugs that seem to be in the vicinity of the area you want to familiarize with. Heck, I even do this o

Another strategy that I've often used is to just fix a few bugs that seem to be in the vicinity of the area you want to familiarize with. Heck, I even do this on my own codebases that I haven't touched in a while. I find it helps focus the mind, provides a clear definition of success and forces you to think about a specific area of the code without requiring too much context.