Agree with all here, save what hearing you have, once gone, its forever. I've been using the Bilson L2f's the last while, very comfy, with plugs as well when running the 266 (its a loud puppy!). A whistle (the two-tone logger ones) are cheap and very effective attention getters, I like the vibrating phone idea too, also a good idea to get your signals straight with hubby. When I'm cutting with anyone I make sure they know not to come up to me from the rear (or tap me on the shoulder etc., like stay away), come around to the front at a safe distance and wave the arms, hm, maybe a high-power LED flashlight and shine it on the log? Whatever method you choose, stay safe and protected at all times. (edit), ditto on the splitting, alot of the stuff I've had to do lately needs a wedge and sledge and that last ringing hit is a, um, a ringer! Loss is cumulative too btw.
Look after that hearing!!
My wee 0.02$ worth for the morning before heading to the woodlot.
Serge