Tip # 1- Buy the correct putter. Make sure the putter fits you well. You want the length, shape, weight and design to be correct for you. Any golf store should have a pro on-site to help fit you and most country clubs have a pro that will help you choose the correct putter. If you are not using the right equipment you will not get the most out of your golf game.
Tip # 2- You may need to change the grip on your putter. Many people need a different grip for putting than they do for regular hitting. Many pros often change the grip on their putters and this has helped them to improve their short game.
Tip # 3- Decide which type of putter you are. Do you like to hit to the front of the cup or back of the cup? If you like to slowly hit the ball in you may be a front of the cup putter, if you like to hit with a little more aggression you are probably a back of the cup hitter. Practice from different angles and determine which style fits you best.
Tip # 4- Practice putting every day! It sounds simple, but practice does truly help. Practice putting from different lengths angles and on different courses. You may want to start with shorter length putts. After you get a certain number of putts in, move to a little bit longer of a distance and build up from there. Practice, Practice, Practice.
Tip # 5- Don't rush. Assess the slope and the breaks in the green. Get a feel for the angle that you will be putting at. Visualize the ball going into the cup. Try to gauge the surface, is the green fast or slow? All these things will help you with putting the ball in the cup.
These tips should help you in improving your putting game. If you find that you are still struggling with your golf game, you might want to have a pro come out and watch you putt. You may be doing something that you are unaware of and a pro can help you out. The best advice is to practice and take your time and you should find that your putting game keeps getting better and better every time you go out