And the biggest reason it happens is because you lose concentration and don't take your putts seriously.
Cure: Make sure you are holding the putter in a fixed position during your practice putt, then do your putt.
2. Your golf ball can hit the rim of the cup and go off to the side.
Cure: Well, this might not be your fault, but sometimes in the early morning after the cup is installed, a lip can be present around the hole from the installation. Step on the hole when you take the flag out.
3. Your golf ball goes too far.
Cure: Practice on the putting green before you go out. Practice how far your ball will go with a quarter, half, full stroke. Make sure that you do it for uphill and for downhill.
4. Your golf ball veers off at the end mysteriously on short putts.
Cure: Follow through to the hole. On short putts, it often feels like you should just tap at the ball, following through to the hole will make it go in the direction you intend.
There's other tips, but if we all practice like Tiger Woods, we get better. His thirty foot putt today at the BMW Championship in the FEDEX Cup looked hot. Read more here:
http://bleacherreport.com/articles/1327058-bmw-championship-2012-tiger-woods-and-rory-mcilroy-make-playoffs-relevant