There are a lot of factors that go into keeping your sperm healthy and viable, gents. This video from the folks at Revision3 explains some of the strange things you may be doing that could compromise your reproductive odds, as it were.
If you're not particularly interested in having a child, these may not matter to you, but good reproductive health extends to good overall health, and the tips above are good reminders. Fatty foods and obesity, for example, are serious hits to your reproductive health.
If you're looking for easier tips to remember, here's one: Don't use your laptop on your lap. It's well documented that the heat from laptops can be pretty problematic for male reproductive organs (for obvious reasons), so as the video suggests, "power down before you get down". Hit play on the video above for a few more tips.
6 Weird Ways You're Ruining Your Sperm [Revision3 (YouTube)]