They're all right in using your ear, and combining it with theory etc. But there is no hard and fast right way of doing things, whatever works best. Plus don't let people tell you the right and wrong way of doing things. All players have picked up things off other players either by listening or seeing and listening. Also this is a forum where better to ask for help.
With regard to the 'clinical' thing. It may be, may not be, but by trying different things that you haven't before over time it will become part of your natural ear and ability etc.
Anyway here is a couple of simple ones of the top of my head that i like and were early ones that i picked up
Root,5, octave, ninth, octave
root, 5, combination of 7, octave, ninth