I don't have a cab with that fancy shmancy air conditioning or music. So I mow as efficiently as possible, as follows:
1. Line up over the vegetation to be cut.
2. Drive around.
3. Try to stay over vegetation to be cut.
4. Try to spend the least time possible over vegetation already cut or vegetation not to be cut.
5. Continue until there is no more vegetation to be cut.
6. Get a cold drink.
In approximately six hours of mowing, the ten minutes variance that depends upon how much you do or don't optimize it doesn't really matter. At least to me, a non-commercial land owner who does his mowing on the occasional weekend. Heck, sometimes I do circles over vegetation already cut just out of boredom. Sometimes I just mow a Formula 1 track around the property for my kids to ride their dirtbikes on, think "that sure saved me a lot of time compared to mowing the whole thing" and get my cold drink early.