I swim a mile three times a week. I love it. The routine I do is:
warm up: 100 yds breast stroke
25 butterfly, 100 freestyle, 25 butterfly
25 backstroke, 100 freestyle, 25 backstroke
25 breaststroke, 100 freestyle, 25 backstroke
then with paddles on my hands
25 right side butterfly, 25 left side butterfly
25 right side butterfly until halfway then full butterfly
25 left side butterfly until halfway then full butterfly
50 yards butterfly
50 yards 5 types of kicks
50 yard sprints: butterfly and freestyle with warm down breast stroke between.
That's what I have time for.
Today because I had more time I went to lift weights for 30 min.
I felt great!
I like that breathing exercise that someone described in an earlier post.