Belly putters are a great option for those players having a hard time making an arc with their putting stroke or have a hard time keeping the clubface square because they anchor the putter handle on the torso
Placing Clubs behind and in front of your ball on the target line is a great way to work on your alignment and get your clubface square while you are on the practice tee
Think like the hands on a clock when you are pitching; go back to nine, then forward to three and just brush the grass