United host Burnley on Saturday.
Ten Hag said: "Out of possession, we have to be better organised, better disciplined and we have to play with a high intensity.
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"And we have to keep doing the stuff in possession, because I think we make huge progress in this season in attacking transitions - we have scored so many goals. If you see the difference between first season and second season now, it's immense, so we develop our attacking style of playing.
"Most important this season is the back four. We didn't have a sustainable back four.
"There have been so many different partnerships, swapping the full-backs. It's also that our attacking players have to contribute more; (be) more disciplined, more pressure on the ball and matching better the runs."