I'm doing more and more errands on my bike. The more fit I am becoming the easier it is to ride my bike even if I have to take a longer route to avoid the heaviest traffic.
A lot of little details had to come together to make the transition easier: riding skort/skirts and riding shoes with recessed cleats so I can wear comfortable for-cycling clothes to ride in and still feel comfortable in the store/bank/library; panniers so I can just have my groceries bagged straight into them; good lights for nite riding and a bracket to hold me cable lock so its not a hassle getting to it.
Recently added a VERY lightweight German-made mirror that really works well.
I want to help change the culture where I am -- thanks for the links and we can all do our bit. Part of it for me is also having biking appear "normal" and do-able -- I guess the word I'm searching for is actually "conservative" rather than bicyle culture appearing like some left-wing liberal Al Gore plot (I'm in a very blue state, folks!).