I bought my first A5 Filofax a few months ago (a black A5 Identity) . I love it and use it as my blog planner/all my online stuff and use it in conjunction with my daily planning notebook.
My Personal sized Cross Filofax (my previous Blogging Filofax) has been replaced (although I do hope to repurpose this Filofax soon).
My next project is working on my writing. My proper writing not just my blogging. Next month I want to focus on my writing and my new A5 Finsbury in Pink is going to help me do this and is now my Writing Filofax.
I am currently trying to resist the urge to go ‘girly’ and simply ‘pink it up’ completely, but I am finding the black and pink pens working well for now.
I am still in the process of playing around with setups and will blog more on that when I am up and running. For now I just have my weekly plan / to do list on my week on two pages (column format) which was supplied with the Filofax, a year planner and pages for writing.
Planning with Printed Portal 
Pingback: Mid Year Stationery Limbo | Planning with Printed Portal
Very pretty.
I recently jumped ship to Franklin Covey, but have used both that and an A5 Cuban for writing. I jot down story ideas, track sales, keep publishing info, etc.
How will you use yours to help with writing? And what do you write?
I hope to have a small diary section (only 1 month in advance) of to-do and goals, then a lot of fun paper and rough paper for a mix of brainstorming, ideas generation and writing.
I do writing mainly for the enjoyment of it and write a mixture of fictional short stories which I use as a creative output more than anything and some non-fiction.