A landing light on an aircraft makes it many times more visible, day or night, than otherwise. Wing tip strobes are also good, and a large triple flash beacon-type strobe with more candlepower is even better. Showing a landing light during the day has an additional benefit. An FAA study during the 1970s concluded that turning on a landing light cut down on bird strikes. So, to avoid aerial collisions of all types, use that landing light for more than just night touch down.
Light bulbs are cheap insurance.
An often-overlooked consideration for improving your visibility, and thereby reducing midair potential, is the airplane's paint scheme. When United Airlines went to their latest paint job, the airline received numerous complaints from their own pilots and others that their planes are hard to see. The airline's CEO said he never gave that aspect a thought when he decided on the blue and gray combination. When it comes to paint schemes, bright colors are best. Stealth colors may be pretty, but they can also be hazardous to your health.