I use a dime/nickle sized glob of cremo for head shaving. I get my head wet and rub it in. Then I use two hands to shave. One to hold the razor, the other hand, I keep wet and rub ahead of the razor to keep the cream wet (and slick) and feel for risidual hair. I rinse the razor frequently and for additional passes I just rewet with my non-razor holding hand. Works great, very slick.
I've used this method with carts, DE and lately SE razors. I also keep a towel handy to wipe my forehead and dry my hands when I switch the razor between hands.