I'm lazy and I buy mine off the shelf but if you are inspired by crafting as well as journaling, there are plenty of ideas for DIY journals. Big or small, DIY journals are perfect for you or for gifts. If you're into smash books (a recent trend I hadn't heard of) or planners, the ideas for DIY journals are transferable to those too. Make a journal or smash book you'll treasure for many years.
1. One Line per Day
There's no reason why DIY journals have to be in book format. I love the idea of just writing one line every day for a few years (actually a lot of years 'cos there's the reverse of each card too).