Here's a fast and easy way to reduce the amount of splintering that occurs when cutting wood with a hand saw. Apply a strip of masking tape along the cutting line on the backside of the piece. You'll notice a significant improvement. Another way is to use a utility knife to score the cut. This will give you an accurate measurement and make the cut smoother.
Use task lighting; instead of brightly lighting an entire room, focus the light where you need it. For example, use fluorescent under-cabinet lighting for kitchen sinks and countertops under cabinets.