Charge cycles increase?
Your charge cycles increase every time you cycle through the the equivalent of a full battery charge. Mac laptops made since the "unibody" style was released use lithium polymer batteries which should retain 80% of their battery power after 1000 charges. (So if you got 7 hours out of the box, you should still be getting 5.5 hours.)

In general I wouldn't worry too much about your battery health. Lithium polymer is extremely flexible as a battery technology and Apple makes some of the best batteries in the electronics industry. The only way to really ruin the battery is to keep it plugged in 100% of the time. Unplug it at least once a month for 5-10 hours and you should be fine. With 1000 recharge cycles guaranteed Apple is expecting you to replace the system before you ever suffer issues with battery life.