4 Hour Rule

Slacker Manager sets out the plan for the Four Hour Rule - a little trick for taking some personal time at the beginning of a workday:

The whole trick is the expectation you're creating. If you show up to work on time, you've created the expectation that you'll be there all day long. By leaving early, you're breaking the expectation and people will wonder what your problem is. If you create the expectation early on that you won't be in the office at all, then when you break the expectation by showing up, people will think you're amazing.