Lifehacker's Top 10 Body Hacks, #3: If you sip on that frozen margarita too fast, you'll have an ice cream headache in no time. Stop it with a simple tongue technique:

"Press your tongue flat against the roof of your mouth, covering as much as you can. "Since the nerves in the roof of your mouth get extremely cold, your body thinks your brain is freezing, too," says [Ben Abo, an emergency medical- services specialist at the University of Pittsburgh.] "In compensating, it overheats, causing an ice-cream headache." The more pressure you apply to the roof of your mouth, the faster your headache will subside." (Source: Men's Health)