It takes a certain amount of dedication to blog every day. The key is to remember every day not to not blog.
But the process also affords an interesting kind of luxury. If you get it wrong one day, you have a chance to get it right the next.
Essentially, daily blogging a kind of laboratory for trying out various things. It has also taught me how to simply write, without sweating the process too much.
And that by itself is very a valuable form of exercise. I highly recommend it.