This is only my second spring with my chickens, I've learned a lot on the way. Heres what I would have done different:
1. Make sure that I selected the right location for coop and run. I just paid some kids to move the heavy thing across the yard. Its a bit shadier for the summer time and I can section it off so chickens don't eat my veggie garden this spring.
2. Bigger coop from the start. Not just due to chicken math either. Over the winter we get lots of snow and they spent a lot of time in their 4x4 coop. Even though there are only 3 chickens it was tight. If I ever want more chickens, and who doesn't, I will have to build bigger sooner.
3. Don't try to negotiate with a bully bird, get rid of it straight away, every one will be happier. Its just not worth it.