If you can't lie down, move around, or take more than a second, Cassity says a drop of peppermint can perk you up all day.
"Put a drop of peppermint oil on your wrist and sniff it," she says. "It will automatically perk you up."
No oil on hand (or wrist)? Try this acupressure tip instead: It targets an area called Stomach-36, Cassity says, and can wake up your whole body with a press of your fingers.
To find it, reach down to one knee and find the bony protrusion just below and outside the joint, at the top and side of your shinbone. Measure four finger-widths down the outside of your calf and dig into the flesh about one finger-width away from your shinbone until you find a tender spot.
"Gently massage this area as though you're polishing a stone," Cassity says. Rub this area for five minutes and you'll magically pep up… and improve your digestion in the process.