I started using a mind mapping program to keep my journal and to also write my blog posts (which is part of my journal). I got the idea from reading a book by Ian Stables called "The Amazing Book Writing Method". In it, Stables talks about how you can write full length manuscripts using FreeMind (a free mind mapping program). So I gave it a try and it works great for me. In fact, it has doubled my writing output. It turns out that writing in chunks works great for me. Here is what I do.
First, I create a map for my journal with a "node" for each day. Then for each day I create nodes for what I write (which for me includes a section for prayer, scripture, my day, my thinking - which is were I get my blog posts, and writing). Then I create entries for each of the "chunks" I want to write in each section using what is called a long node (created by hitting Alt and Enter together in any node). Then I just write in each chunk until I have down what I want to say and I move on to another chunk.
So far this is working fantastically for me (thank you Ian). If you are so inclined, give it a shot. FreeMind is a free Java program that runs on either Windows or Macs (but not on Chromebooks though - bummer). Just Google FreeMind and it comes up.