I find it really useful to re-read some reference documentation for any tools or languages I'll be expected to know, and to solve some simple practice problems

I find it really useful to re-read some reference documentation for any tools or languages I'll be expected to know, and to solve some simple practice problems (e.g. actually write some basic functions). The purpose isn't to memorize the documentation, but to refresh my memory so that I don't have to fish around for basic syntax or rules.