No one mentioned safety sausage or signaling devices.
For me, that's the way I dive, just like finning techniques, positioning/trim and compass navigation. When I dive from my boat, I routinely shoot a sausage from my safety stop, because 1. It tells the boat tender we're due to surface in some 3 to 5 minutes, 2. it makes it a lot easier for the boat tender to spot us and pick us up (particularly if there's a little bit of chop), and 3. it makes it a lot easier to go re-e-a-l-l-y slowly from my SS to the surface, something that I know reduces post-dive fatigue quite significantly.
Would you or do you have a line on a spool attached to your safety sausage? How long is it?
A spool with 30m of line and a double-ender is always attached to the sausage, and they live together in my left thigh pocket. Since I'm shooting it quite often, it's a hassle to have to assemble the kit every time. Besides, IMNSHO, if you're
not familiar with shooting a sausage, I think the added task loading of having to attach the line to the sausage is something that could well be avoided in a stressed situation.
How often should you check it?
Since I shoot my sausage (am I the only one who feels that this sentence might be understood in an NSFW meaning?) about every second dive on average, that's how often I check mine. Besides, it's not exactly a complicated contraption, a quick look should tell you if it's OK. I do that every time I kit up and put the sausage/spool assembly into my thigh pocket.
EDIT: When that's said, I don't have enough dives to
not work on some aspect or another with my diving. Breathing pattern, trim (
i.e. DS bubble control and placement), buoyancy control, finning technique, positioning, buddy contact, and situational awareness are all things I (almost) always try to improve on every dive. For me, improving my skills in anything I'm doing for fun, be it diving, mountainbiking, shooting, alpine hiking, cross-country and downhill/Telemark skiing, photography, or cooking (or, for that sake, my job) is something that brings me quite a bit of satisfaction.