Don't wait till less than a week before you're supposed to take the boat out to do everything you've been putting off for the past year.

got parts for carbs, installed , and "tuned"
scraped all the old grease from inside the wheels. need to replace seals
got new tires for the trailer. good thing i did.
replaced and rewired some of the trailer lights
cleaned electric fuel pump
replaced fuel filter
replaced some fuel lines. a hacksaw sucks at cutting steel braided lines. (or at least I do).
tried to redo some boat wiring, but figured it'll work for now and worry about it next year

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I know some guys have done a lot more in less time, but I'm tired.