I used to do to that, ie YYZ-DEN-IAH IAH-IRD-FLL-YYZ on the return
however, now that there is a one year old ms. lcohen999 at home, I'm more up for getting back asap.
Although I am guilty of two SYD runs (with one down) in 3 weeks, rather than combining it into one trip (which I could have easily done)