I haven't commuted in a long time. But, I had a ten mile each way commute for a couple of years in Dallas. I would take my office clothes for the week in on Sunday while running other errands and hang them at my desk.
My commute in was mild pace to keep from getting too sweaty. At the end of the day, I'd put my riding shorts on and stuff my days office garb into a bag and I'd bust butt riding home. We lived in an apartment or condo with a pool and I'd ride up and fall into the pool.