I boat alone most of the time, and I think that any safety regimen begins and ends at the dock. I have seen enough people fall between the dock and their boat that I never take it for granted. For me, my first and last dock line is permanently on the midship cleat, and it is draped through the window where I can reach it from inside and out. On both sides of the boat, I have attached dock lines fore and aft. When leaving the dock, I tie them together when they are free and drop the knot and extra line into the front of the cockpit. The midship line I can remove from the dock cleat while reaching out the window, and drop it behind the seat. When I dock, boat hook always handy, I take the tied lines onto the dock and use them as a bridle to control the boat until the midship line is cleated. After that, for and aft is easy.
On the water, I think that too many hand grips are never enough, including a SS handle on the visor. I don't fish much but that will be the time that the boat bucks around the most, unsteered and slow or drifting. I have a permanently lashed handle (a piece of plastic pipe lashed slackly to the roof rails) that dangles below the cabin roof, and I install a heavy rope on each side between the grab grips and the stern cleats. They slope down, so are no substitute for a proper rail, but they are handy grips.
Fenders present another problem, keeping you near the side and possibly reaching overboard. I carry 4 fenders on my active side, the last being tied to the stern cleat — not too bad. The 3 forward fenders have a line that joins together their bottom loops and terminates at the cockpit where I can tie it to a handle: pull this line snug and cleat it with all 3 fenders clear of the water and up on, or parallel, to the gunwales. To release, uncleat it and give a little yank. It takes a little fiddling to adjust the first time, then it's all good.
For re-entry fom the water (which I never have done,) I keep a portable swim ladder ready to hang on the coaming, and a single step rope ladder rolled up against a stern cleat at all times. In addition, I guess my Doelfin will allow me to climb the outboard or use the engine tilt control for a boost. Jeezh!
Last, but not least, I wear an inflatable PFD, and put it on as soon as I arrive at the boat. Slippery dock, cold water, and the nearest pull down ladder is HOW FAR away?
Happy New Year, and a safe one, to all the Brats.
Rod