Post time to comments.
Harney is a 25yd pool (not meters)...so down and back 17.5 times.
Three quick pointers from Todd (D-I freestyle swimmer and all-around nice guy) to get you focused:
- As part of your warm-up, perform some short flutter kicks with a board. Think about pointing your toes and "flexible" feet (like fins); make sure to keep your hips up.
- Use rotary breathing -- try to maintain a breathing rhythm of every 3rd stroke (right side, left side, and so on) or 5th stroke. Breath control is crucial in helping conserve energy and building endurance to stay underwater off the walls (either after a flip turn or push-off).
- Think "long stroke" during freestyle. Rolling along the horizontal axis as you reach as far forward with each stoke as you can is very important. As you bring your hands forward, get your elbows as high as you can. Also, count your strokes and keep them as low as possible per length.
Can't sum it up in a single 2:00 clip. Find an experienced swimmer and pick their brain, or google around for more pointers on form. One potential resource is USA Swimming's 'Training & Technique' site.