I’ve tried keeping a diary before, but just couldn’t sustain it.
Gave up after a couple of weeks. That said, I think a paper diary
would be better than a blog, unless you are an attention-seeker or
have a lot of comments to make to the public. A paper diary is more
private, and as it is less amenable to amendments than the online
version, I believe one would take more care in thinking and writing
in it.