Swimmers of all ages, Masters to Age group need to find out what motivates them. Swimming can be a hard and brutal sport; one person wins, everyone else loses. In the Olympics we typically only remember the gold medalists.
Based on these harsh realities most normal people need to find there own personal reasons that are not being the best in the world. It might be, completing an open water swim, taking off 5 minutes from a mile swim, dropping 3 seconds in a 100 freestyle, or losing 10 pounds and making a commitment to a healthy lifestyle. I cannot give you, your motivation, but find achievable goals that help improve your body and mind and you will not lose.
Basic Technique Tip:
Quick Breaths: Exhale your Oxygen underwater, quickly turn your chin toward your shoulder while in the swordfish position, take your breath out of the side of your mouth, one goggle still in the water, and snap the eyes back to the bottom, head in line with your spine. If you see your arm moving forward your breath was too late and you need to breath sooner and get your head down sooner.