Seriously, the only thing I would recommend is that you don't clean your guns with loaded magazines near by.
That was going to be comment #1. Comment #2 is don't eat or drink while cleaning a gun, or clean a gun where eating and drinking takes place on a regular basis. Primer residue contains lead, and you really don't want lead to get into your mouth.
FWIW same goes for smoking; the act of bringing a cigarette to your lips after touching primer residue can also transfer it to your mouth.
BTW I don't intend to be patronizing; it's just that NDs, ADs, and lead poisoning are typical examples of things that people don't ever think will happen to them, until they do.
The safety precautions are really pretty simple and straightforward, so I like to follow them whenever I can.