[thaumasiotes]

> it's all too easy to forget things even if you have more than a vague recollection. Whenever I haven't dived for a couple years, I always ask an instructor to check on me while I prepare for the first dive, because I just don't trust myself.

Do you have a checklist?

[bonzini]

If you mean something to go through physically (e.g. on paper) no, at least not for non-technical dives. There is a standard list of things to do, which I agree with the parent comment you should remember more than vaguely before diving.

[nradov]

Here is the recommended pre-dive checklist.

https://gue.com/blog/the-gue-pre-dive-sequence/