I haven't done my 12 mile commute to work again, because I was so exhausted the first time (1-1/4 hr.) I think I need to put smoother tires on the bike for starters.
But I did decide to bike to the grocery store about 2 miles away. I decided that I want to get accustomed to the idea of using a bike as "transportation" rather than just "recreation". I took the long way thru the Bird Sanctuary trail, and I wanted to avoid biking along highways, by trying to find a way thru the apartment complexes. But I wasn't able to do that, as the apt. complexes are all surrounded by chainlink fences. So I did have to ride along the road (the one with no shoulders) for a short while.
It was my first errand-running bike ride! I bought a few things that I would have jumped in the car for. It was a beautiful evening and not only did I get my errand done, I had a great endorphin high too!