I also recommend humanitarian research via BOINC, specifically using the World Community Grid, which hosts an excellent selection of worthy projects. https://secure.worldcommunityg...

1. Plenty of water - keep a full bottle at your desk and you can easily drink 2 or more litres each day.
2. A little Advil - just to keep the withdrawal headaches down to a dull roar.

Your cravings and headaches will be worse when you're mildly dehydrated. Drinking enough water and refilling the bottle will give you plenty of reasons to take breaks throughout the day.