There are many methods that people use to practice their putting. Not everyone has the same training or learning patterns so it's whatever works best for you and what you learn. I can recommend various ways to improve your putting and they don't involve spending hundreds of pounds on swing training equipment or lessons.

Building a strong putting technique involves improving your tempo, hitting hundreds and hundreds of practice putts and making sure you learn the greens that you are regularly playing on. Analysing the conditions, course setup and individual green undulations, you learn to control your putts better.

Use two other golf clubs

One of the common issues with putting is the ability to align yourself with the hole and also have the putter face facing forwards. What you need to do is get two other clubs like your 7 iron and wedge and align them at the direction that you wish to aim a putt. One is a club that you will align your feet with and the other is what you will use as a guideline for your eyes and where you should be stroking the putter. Make sure one is in front of your feet (if not touching them) and the other about 1 metre in front of it, just after your putter face. Make sure you align yourself with the clubs and not the clubs are pushed to align with you because that won't work.

Put three clubs around the hole

Bit vague that title so let me explain further about the club 'box' method. You hit putts with the aim of hitting them without a couple inches of the hole. If you don't, you leave yourself a nasty one coming back. A trick is to set up a 1 foot box around the hole with just one side open so you are able to hit the balls in there. The clubs should touch and form a small trap basically around the back of a hole. Remember tic-tac-toe? Similar to one of those boxes. You will now hit the ball from any distance away and try to hit it close enough to the hole so you don't roll on and touch the clubs. If you do, you should retake the shot.