Last year I made the mistake of buying the wrong format diary refill for my A5 Filofax. I made too hasty a decision in December, and by the time I realised I had made the wrong choice it was too late to get the format I wanted.
So I noticed that it's possible to buy 2010 refills 6 months before the end of the year... but I'm not going to rush into buying my refill for another couple of months yet.
So which format to go for? Obviously your first decision will be what size to match your binder... OK, that was the easy bit!
If you're just going to stay with the same format as this year, then your task is very easy. Filofax have standardised on the product reference code for their diary pages. This page has all the details. If you're buying from an alternative supplier, you should be able to check the product reference code against the ones shown on the Filofax site.
Looking at the catalogue on the Filofax website, you will notice that there are more different formats for personal or slimline size (95mm x 171mm) than any of the others.
The choice of refill will be a bit of a compromise between writing space and the bulk of number of pages for just your diary section. We all like to have plenty of other pages in other sections, don't we?
There are even choices to be made even for what seems to be the same format. For instance, in 'two pages per week' format, the multi-language version starts the week on a Monday and has reduced space for Saturday and Sunday. Or go for the English-only version, which starts on Sunday and gives each day the same amount of space, with a notes section at the end of the week. There are other variations as well, so take a look at all the options open to you.
Some of the larger formats offer additional planning tools in addition to appointments, as with the A4 Business Diary. This refill is quite expensive, and it's in 'page per day' format. Half of the page is dedicated to appointments, whilst the other half covers To do, Reminders, Phone calls/correspondence, Things to delegate. This would have everything for the serious 'GTD' (Getting Things Done) devotee.
If you find that some days or weeks that you need more space to write notes of a special occasion or a meeting, then you can easily slip in a sheet of ruled or plain paper. I tend to put a to-do list in to my diary in the week I'm going away so I can add things to the list for things to take away with me.
There are also choices on some formats on the colour of the paper; most are white only, but some come in cotton cream (a favourite of Inky's I recall) and also pink (to match the pink breast cancer edition binders, I presume).
I think we now know why Filofax place their diary refills on sale so early! Have fun choosing your next refill.