Balance exercises to improve push hands

Cross training is an essential component of push hands. As well as balance, the difficulty of throwing a ball that returns centre to the receiver is visually obvious and the benefits immediately transferable to push hands. If you can do push hands on one foot ( I can't), you're really off to a good start at becoming a grounded push hands partner.

simulating brush knee and push

https://www.youtube.com/watch?v=qEp6kz8Fy_U

Working with reflexes,  and depth and peripheral perception. Add the movement precision you get from this repetitive simulation to a heavy bag and your brush knee and push should manifest some remarkable improvement.