If you want more pars here here to get the putterwheel. It is one of my favorite training aids. It ensures a super square face at impact and helps to ensure that you are the correct distance from the ball. So, let's get to it!
https://misspar.com/products/the-putter-wheel
One of my favorite fun ways to practice breaking putts using a croquet set. You can work on breaking or straight putts of any length to groove speed and line. Head here to get these: https://bit.ly/2HpVR8b
Do you have an overactive head when you putt? If so, you are missing the cup. Excessive movement with thy head, throws your shoulder line off, which in turn will throw off your putt's line. Instead, grab a penny and use it to calm those thoughts between thy ears.