2 things I do on mats with painters tape,
Option 1: place a strip directly behind the ball and practice hitting the ball without touching the tape but making sure you do hit the mat.
Option 2: place a piece of tape 3-4 inches in front of the ball and practice hitting the ball and scrapping the tape.
I find option 2 is the best when you aren't hitting it well because it gives you a good focal point however, once you get good at it switch to option 1 so you don't have to constantly replace the tape.
option 3: put both pieces of tape and practice missing the back piece and hitting the front piece. Bring lots of tape.lol.