I've adopted these as a part of my preflight / water safety process:
I visually inspect the boat's mission critical systems before I go, and also do routine maintenance on these. Also worth noting, I have “broken” or prevented a failure of every last one of these:
(* Editor's note: you have to learn what replacement schedules you want to follow for the equipment that you use. Some of the replacement frequency that Mr. Cryder practices could very well be based on the specific nature of the equipment that he uses. For example - if you use a leash that has no velcro and no metal parts or segmented connections such as a strong 1 piece dyneema kite leash and you take good care of it (don't leave it out in the sun, don't abrade it) then it is highly unlikely that you need to replace it anywhere as often as annually. But if you use a leash that is less simple and robust?….* Also - for most of us who keep our PFDs out of the sun when stored, there is no way that they will degrade to the point of needing replacement every 3 years - and PFDs can be easily inspected for their wear and reliability - 2 piece paddles on the other hand are a different question and it would not be unreasonable to replace downwind paddles after a number of years (retire them to flatwater use) or to use a 1 piece paddle for local downwinders)
Other safety related thoughts: