I've always journaled though only electronically, in markdown, saved into a private git repo. Many journaling proponents insist that this only works if it's hand written but I disagree. I get the same carthasis effect at the end of my writing, and the benefit is that it's actually legible compared to whatever squiggly lines my poor excuse of handwriting is.

And most importantly, because it's electronic, I can go back and easily find how many times I've written on the same subject with a simple grep command. That tells me that this topic is important and I need to take action on it. Hard to do that with a paper journal.