A blog makes a wonderful daily notebook to yourself, and if you don't mind sharing some of your private thoughts you can make it public - as I have now for several years. If you are more of a private person you can limit access to your blog to yourself only...or yourself and the people you want to share things with.
I highly recommend blogging for anyone interested in journaling or just jotting down things that interest them for future reference. It's a great way to organize your thoughts (well maybe not in my case) but for some.
Blogs make it easy to see what you were thinking about a month ago or a year ago etc. If you have a web link you want to keep, it's easy to embed it in a blog post. A book you are interested in...an idea..a picture...put it in your blog and it's easy to find. A blog is like a huge spiral bound notebook (you can rearrange posts by changing the date if you find you don't like the order of things you have posted). You can paste pictures in it, make it different colors, different styles...
You can organize things by topic if you use Movable Type (not so easy with Blogger). Blogs can be a great learning, recording tool. They are super easy to create and update.
