I used to look at my hands and that worked great for my first few lucids but then my brain caught on haha and ever since iv always had 5 fingers in my dreams that I know of. Now my RC is looking between my pinky finger and the finger next to it and I grow an extra pinky finger. In WL I just try to push a finger out and expect it to happen, when im dreaming it slides out very easily and its only failed me once that I know of.