I've always advocated maintenance on the basis of need rather than routine PROVIDED that you take notice of the clues that the machine/car/whatever is trying to tell you.
Yesterday when I was swapping a blade in my table saw for a fine kerf one I could hear a slight rubbing noise when turning the blade by hand.
A bit of investigation showed that a screw clipping a cable out of harms way had dropped out and to cable was rubbing on one of the drive belts when the depth of cut was at particular settings. I found the screw in the bottom of the sawdust bay. Fortunately easy repair to the insulation and the screw replaced with a starlock washer this time and all is now well.
A bit of trivial maintenance saved a breakdown mid job.
So my tip is get used to your machinery, know what it should sound like and investigate noises immediately to save tears later.
Bob