Tell me how to combat giddiness at work?

Work activities? I'm not sure of your specific definition of "giddiness" -- do you mean dizziness, or possibly frivolous and lighthearted? Also i don't know what work you do. If you're dizzy at work, look at the positions you get in for work activities, and make sure you're drinking enough water to not get dehydrated (could lead to dizziness). If you mean lightheartedness, it might make your workday more happy.