Here's a few pages from my journal.
I've become a big fan of these grid-style pages. I've even written down a process to make them. I draw a figure and then divide the page with one section for each thing on my mind, each issue I'm facing. In each box, I draw a symbol of some kind that represents the item. Then I layer, layer, layer, using water colour, rubber stamps, pencils, charcoal, acrylic... And when I'm happy, I slash into it, making it old and dirty. In real life, these are lovely - thick textured paintings and I really enjoy them.
On the right page, the pencil sketch is actually a flap, and when you open it, inside there's a letter I wrote to myself, age 15. That was an amazing exercise. Back when I was 15 I was so unconfident. I never knew I would "make it" as an artist. My friends were so environmentally minded and I knew NOTHING about global warming and other enviro issues - I felt really inadequate. I wouldn't have believed that I would end up showing other people how to make good choices in that regard. The most interesting thing that came out of the letter, was that I told myself I didn't need to TRY for success. I simply had to stay true to my inspiration, and do the things I felt inspired about, and everything would roll out from there. And when I wrote that, I realised that I had a mantra for the rest of my life. From here forward: stay true to my inspiration and don't strive too hard to make it work. Trust that things will fall into place. I like it.
I recommend this as an exercise - write a letter to your younger self.