Don't say "Go away!", instead walk yourself away

The harder you try to let go of something, the more bound you become to it.

"Go away, go away, grrr really GO AWAY..."

To let go of something, just walk away from it.  Let it be what it is, without trying to change or destroy it, and just walk away from it. (Don't go back to see how it's getting on.)

Rather than commanding the 'thing' to go away, as if you have some authority over it.  Exercise the authority you actually have, i.e. the authority you have to remove yourself from the thing.
(won't work it cases where the thing can follow you of couse - perseverance and/or authority required for that.)