I earned a two year degree in web development at a local technical college in Minnesota back in the Spring of 2008. Since then, I've done whatever possible to stay current with web technology trends and practices. Some important web sites for web designers and developers include W3 Schools, PhP Academy, Tuts Plus, different YouTube channels like The New Boston, Think Vitamin / Doctype, and various web development blogs such as Css Tricks. Not that I necessarily follow up on all of these but they are highly regarded in web development. It seems like Doctype is an abandoned project since a new tutorial hasn't been made in a long time (it is by the same makers as Think Vitamin.) Think Vitamin requires a paid membership to view most of their videos but most of the time they offer a free introductory video on a given topic. It could be that they no longer contribute to Doctype since it may not be very profitable for them, as all of those videos are free.
As for blogging, I need to be knowledgeable of different topics to write about so that I have productive reasons to go online every day. I spend time on web sites like Reddit, Digg, YouTube, in search of knowledge and inspiration. There isn't necessarily any one topic that I'm totally dedicated to right now. Blogging is actually a broader topic than what some people might realize, but it sort of depends on who you ask. Writing tweets on Twitter is considered microblogging and if you would include something like that as the standard definition of blogging, than most people are bloggers. (At the very least, most young people are bloggers.)