You are the biggest factor in determining the health of your battery. Try to keep your battery charge between 40% and 80% and don't sweat it if you need to occasionally go over or under those limits. If you're going to be flying tomorrow and want to use your laptop then sure, charge to 100%.
Keep in mind the worst thing you can do for a battery is keeping it continually charged or continually undercharged. They're "happiest" around 50% charged. But like I said, use the 40% to 80% as a rule-of-thumb and live your life and don't worry too much about it.