This is the stamp I use to mark my swimming and diving--and have used for years now.
Simple system. If I swim or dive, I stamp my datebook. When I look back at the days or months and see red, I am gratified. If I look back and see a lack of red, I am unhappy. "Do it for the stamp" may seem a bit lame, but whatever gets me into the pool or ocean is worthy of merit right now.
2013 was not a very red year. I need to get into shape, better shape, swimming and kayaking shape.
2014: I'm aiming at well-marked pages, plenty of snorkel-cats. I earned one today.
Wish me luck.
