mechanical :basically , you need a rotating mass around a pivot, at a timely manner this mass need to do two things 1: accellerate on itw on axis 2: elongate its radius describing an ellipses. Basically evertying which rotates with a velocity which is greater than the rotating velocity of earth in that specific place, will experience antigravitation.
by meanse of electric field coupled with a magnetic field, both of them needs to be time varying and out of phase of 90 degrees
Another method i am investigating involves laser rays , more on later
I don’t want to mention lifters becasue they solve half of the problem
I don’t take into consideration planes, elicopters(sp??) , or ducted fans devices