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Whatever your predive safety check process is now, modify it to include the computer. Anything mounted on the wrist is often the last thing that is put on, and it is the easiest thing to forget. As a part of that check, make sure it is set to the correct level of oxygen in your mix. Doing a dive on air when your computer is still set for nitrox from the last dive is a good way to get bent. When I teach OW classes, I alter the old PADI BWRAF to BWRAIF, with the I standing for instruments. (Mnemonic = Bruce WIllis Ruins Another Independent Film.)
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One of the advantages I perceive in my wristwatch-style computer is that it is essentially ALWAYS on my wrist, wherever I am, except for the few seconds during which I am putting that arm into the wetsuit.
I know there are whole threads on mnemonics, but I like the Bruce Willis variation. There will be a time in the not too distant future that I ditch the wristwatch-style for a computer with a large colorful display. I really have liked my D6 and congratulate the OP on his new D6i.