Some other Do's:
1.
Do realize that back zip drysuits are as self-donning as other zipper placements. (If you can reach your valves, you can do this trick!)
2.
Do a gear check in the water, especially your back-up regulator or redundant air source in the water. (Especially if you are entering an overhead!)
3.
Do a bubble check by looking into your facemask (lens held at an angle) or a mirror. (Send money to my website address if you like this!)
4.
Do place an oxygen bottle in the water where you can reach it if you are doing a dive in which DCS is a risk. (We'd often leave O2 in the truck in the jungle. Duh! What if we couldn't make it to the truck?)
5.
Do mentally run through, "What if?" situations for your planned dive. Get your head in the game by visualizing how you will handle each scenario. (How can you treat yourself for bleeding? Shock? DCS? Stings? What will you do if you get a piece of gear caught? Entangled? Stuck?)
6.
Do carry food, water, survival and signaling gear if there is any chance of becoming lost at sea. (Snickers really satisfies!)
7.
Do carry at least 3 cutting tools for any nasty line, wire, or other entanglement hazard. (Spider wire - bad!)
8.
Do realize that sidemount configurations are a solo diver's best friend if you are not in a unified team.
9.
Do treat your redundant gas as your buddy and maintain good awareness of yourself, your equipment, your environment and your "team" (You & your reserve gas).
10.
Do enjoy the adventure!
11.
Do carry that redudant gas where you can reach it and easily remove an entanglement.
12.
Do mount pony bottles on tanks inverted so that you can reach the valve if you choose to not carry your pony as a stage.
13.
Do carry your reserve regulator in such a way so that it can be found immediately and placed into your mouth with a very high chance of it being there such as bungied around your neck.
14.
Do be able to remove and replace your scuba unit on the bottom, hovering off the bottom, hovering in mid-water, and at the surface.
15.
Do realize that there are pros and cons to different gases and use the gas that is safest for you based upon potential for oxygen toxicity and DCS.
16.
Do have a plan for self-rescue when diving in remote areas which might mean leaving a radio or satellite phone where you can reach it once you've reached the surface. (I came up with this after a DCS incident happened to another cave diver in a remote area.)
17.
Do imagine how your mom or your wife would feel about you doing something risky? Okay, just imagine how your mom would feel about it.
18.
Do take a solo diving course from a very experienced technical instructor if you have any doubts about your capabilities.
19.
Do realize that marine and aquatic life treats solo divers differently than those in teams or groups.
20.
Do please read all of these. A couple are actually good!
A couple Do Not's:
1. Don't scare Andy by changing your dive plan.
2. Don't get caught if you are DIR.