Second what Russ said, make a specific place where you always put your wallet, keys, phone, etc. Don't make it by the front door as a "landing zone" that some people suggest since you may not always be able to exit there.
Do not get a hide a key, I've seen so many people use those and find out their keys are lost because the hideakey fell off.
Find a place well hidden, vent line on top of the transmission or somehting and wire tie it there if you must have one on the truck.
My old truck, from that days when they didn't have carpet, had an access hole that was used when they dip the cab in paint at the factory back under the seat. I taped a key next to it and could reach up between the front drive shaft and frame and knock that plug out and get the key.