How to inherit somebody else's site

The temptation with an inherited project is to start cleaning. Resist it for an hour. Write down what is running, where DNS points, who has access, when backups last succeeded, and what the site does that nobody documented.

That hour pays for itself the first time something breaks and you need to know whether it was already like that. Without it you are debugging your own changes as well as their decisions.

Then clean, one thing at a time, in an order you can explain to the client.