What’s your best blogging advice?

What’s your best advice for people new to blogging? Do you have a different opinion about it now from when you first started? What did you learn from the process? Do you have a good strategy for gaining and keeping subscribers? Are there some things that worked better than others? How do you come up with content? Have you had any luck monetizing a blog? What is the best way, wordads, adwords, affiliate marketing, paid subscription, donations, selling products or services, consulting, or something else? Do you actually make money on your blog, or does it cost you out of pocket? Is there a plugin or theme you are really partial to? Did you make any mistakes along the way? What would you advise a new blogger to do or not to do? Any suggested training? Was it all worth it?

Now’s your chance to tell us all the dos and don’ts about blogging. What experience can you share to help us all be successful at blogging?