Smart phones make it easy to keep essential information at hand. One app I like: Emergency Preparedness Checklist and Guide (for iPhone)
When going to the pool or beach, place phone in a snack size ziplock baggie. You can still use phone through the plastic with wet or sandy hands.
how cool is this. a small device that inserts into your iPhone and allows you, with the aid of an app to process credit card payment right from your phone... this would be great for work!