College hoops sides & totals - no play if it's moved more than 1/2 point.
NBA - no play if it's moved 1.5 or more. At a point yes, as I figure I get enough movement both ways (win some, lose some).
Football - I don't worry about a point unless it's crossing key #'s (2'-3', 3-4, 6'-7', 9'-10'). If it was 3, goes to 3.5, I'll buy it back down to 3 but not gonna buy a 4 back down to 2.5.