I tend to look at the hole, then ball, then hole, then ball and finally I look at the break point. If it's a straight putt, I find I tend to look at a spot about 2/3rds toward the hole and (if close enough) I can often watch the putt go in (hopefully!) without moving my head.
I tend to hole anything within 3ft, maybe 75% within 5ft and just under half my 10footers. Anything over that, I tend to struggle holing.