I have proven to myself that I had better concentrate on keeping my non-bowling arm outstretched with the thumb pointing down during the approach and release. Without a doubt, doing this keeps me lined up better and prevents me from twisting my body during the release and throwing the ball too far to the right. Sometimes even in the gutter, sometimes too far out to allow it to come back to the pocket.
Certainly this is one of the tips on numerous web sites but until one actually experiences it personally it is difficult to believe.
Why keeping the off-arm outstretched with thumb down helps is beyond me but it certainly does.
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Never take a sleeping pill and a laxative on the same night.