John Baez on what mathematicians need to know about blogging:
[...] I could describe how to set up a blog, but that would make it seem harder than it is. Any idiot can do it, and many do. Websites like Wordpress and Blogger will lead you through the process step by step— and they’re free.
And he comes back to this remark a little later:
Should you blog about mathematics? ... Some mathematicians are too worried about making a fool of themselves in public to enjoy blogging. Others are too afraid of offending people. And if my joke about ‘idiots’ upset you, blogging may be too hard-knuckled for you.