Use auxiliary fences to back up your crosscuts
Nearly all tablesaw miter gauges are machined to accept wood auxiliary fences via screw holes or slots, so get in the habit of stocking up on auxiliary fence blanks in different sizes. In addition to giving your workpieces wider support, these sacrificial fences prevent tear-out as the blade emerges from the back edge of the wood. Tear-out transfers to the fence instead of the workpiece. Any straight hardwood with parallel faces can function as fence material, as will Baltic birch plywood, or MDF. Clamp your work firmly to an auxiliary miter-gauge fence to keep your blade from tearing out the back side of the cut.