Let’s be real, unless you’re in first class, where I hear they have actual beds (?!?!…someday…) the possibility of a truly restful, full REM cycle sleep is slim to none. However, even a cat nap or two for a couple hours not only kills some time on an 8+ hour flight, but goes a long way to offsetting jetlag on arrival. So, here are 5 tips for sleeping (a least a little) on planes.  Buy a Trtl pillow. The u-shaped ones never seem to fit the neck right, or feel particularly secure. Plus, they’re pretty bulky and scream tourist if they’re hooked on to your luggage on your way to…