Mindfulness. Out of sight out of mind. Make a goal seen if u want to attract to it. Hide it if u want them to forget about it.
Make the competitor (w same goal as u) think that the goal is not worth it or what they want (surround it with undesirable things)
Give them an alternative goal and make it look like what they want (surround it w desirable things)
If u want them to do something (Ur goal) make them do a simpler goal closer to their current state but this is actually a subgoal that works toward Ur goal (,but they don't realise it)
Cut them off ...isolated have less support an resources and less options ...remove their options