A gentleman I met a few years ago at Oak Park on his way South told me, "You have to do 3 things a day to maintain your boat while out cruising".
Of course not everything below was done in one day. There other tasks that get done way to boring to mention here

Scrape barnacles off dinghy.
I hoisted the dink on to the foredeck and spent 2 ½ hours scraping the little beggars off the bottom of the boat. Then scrubbed the algae with Simple Green and a sponge. Then spent the next 45 minutes blasting the dirt and junk off the foredeck. Note to self - wear shoes when working around barnacles.

Polish steel work
I spent most of the morning polishing the stantions and steelwork for the Dodger and Bimini. I am not a guy to polish this stuff any other time then in the spring, just before launching. But, if you don't keep up with the salt - everything starts to show rust stains, especially cheap stainless. I was actually out there with a toothbrush. I got to tell you, the first thing that flashed through my mind was "oh man, I am becoming Skip".

Fix tools
I spent close to two hours trying to get my crescent (ok, adjustable open end) wrench to work. Well an hour on the wench and an hour on my dial calipers. Seems salt water, salty air, anything with the word salt in it and tools don't mix. I keep a can of WD-40 on the cockpit table next to my water bottle and suntan lotion.

Quick story - I was sitting in the cockpit reading yesterday and a guy comes by with a dinghy full of boat parts. He showed me everything he had, then asked me if I was interested in anything. He told me he was selling his boat and wanted to get rid of some of the junk he had accumulated. I asked what boat he was on and he pointed towards a rock that juts out from the shore not far from me. His boat, an Endeavor 30 something, is tied to the rock and a derelict half sunken steel boat. Turns out he lives on the boat with his wife and 4 kids. I think their expecting their 5th. A million thoughts crossed my mind, all of which I'll keep to myself. But, you got to hand it to the French,,,,,,
I ended up buying an almost new 6 lb propane tank.