The strategies for the push out differ depending on the level of the players.
Between two players of equal ability, you have to assume that anything you can do, the other player can do also. You can't push out to a makable shot, because the other guy will make it too. You can't push for an easy safe, because you will find yourself behind a ball.
So, you usually have to take a little the worst of it...like pushing to give yourself a better angle for a kick shot, pushing for a jump, etc. Sometimes the best thing you can do is tie up some of the higher numbered balls and leave the guy straight in, let him deal with the mess you made.
You pretty much have to leave a low percentage shot, and then hope you execute it perfectly. (If you're given it back) Your biggest hope is that your opponent will try the difficult "kick 'n stick", and hit it poorly.
No matter what you do, Accu-Stat percentages show that the player who pushes out loses that game about 60% of the time.