In the gear goes; tanks get rinsed with the hose outside, paying particular attention to the boot area. Every month or so I knock off the boot and check underneath for any incipient corrosion or trapped gunk.
I have "plugs" that screw into my DIN valves, making the valves water (and gas) tight, and hard Delrin caps for my regs. I NEVER leave either a valve or reg uncapped (either with its mate or a plug) on the boat, so saltwater can't get in through that route. My primary rig goes in the bathtub that way (capped), with care to insure the purge isn't pushed; my sling-style pony goes in the bathtub rigged and turned on.
Drysuit gets a "shower" in the boat (along with my head and hands - this way I am de-salted as well as the suit) before I doff it after the last dive of the day, so its clean outside. If I had any seepage of significance at the wrists (sometimes I do when I'm spearing due to the interesting range of motion necessary for that) I will do a more thorough rinse inside and out, then two-stage dry (dry outside, turn inside out, dry inside, etc)
Occasionally, when things get really grody, I'll take the regs out after the soak, put in a capfull of listerine, and turn on the "spa jets" in the tub (it has a "whirlpool" built into it) The agitation along with the listerine - just a BIT - not much - gets the "grody" out very effectively.
Then I hang it all up to dry in the shower stall, usually overnight, and the next morning put it away in the closet.