1 Corinthians 6:12
All things are lawful unto me, but all things are not expedient: all things are lawful for me, but I will not be brought under the power of any.
Two questions that limit lawful things (things that are neither good or bad in and of themselves)
Is it beneficial?
It may be lawful, but if it is not beneficial to my Christian walk then I should refrain.
It may be lawful, but if it is not beneficial towards other Christians then I should refrain.
Does it dominate me?
It may be lawful, but if it controls me then I should refrain. When you are dominated by Christ then there is no room for any behavior or possession to dominate you.