Well I've been a long advocate of using a Year Planner to supplement your normal diary insert to aid your long term planning. It also has the added benefit of being quicker to spot diary clashes compared to your usual diary insert, because you are seeing a full year in one view.
If you colour code your entries and label them, then you can quickly see if you are free on a particular date. You might of course need to look at the details on a specific date, but often you will remember the details of a particular appointment without needing to double check your diary entry for it.
Of course this all helps us in our race against the screen tappers... we have a new way of turbo charging our diary access techniques. You can patiently sit there drumming your fingers on the desk or tapping your pen waiting whilst they tap and fiddle with their smart phones. I realise we aren't talking about a big time difference here but seconds matter when it comes to taking command of avoiding the date you want to stay at home or at your office instead of facing the motorway or a crowded train on a Friday afternoon.
With a year planner in your organiser you don't have to load the full 12 months in to your organiser all at once.
If you don't currently have a year planner in your Filofax, why not print one out and give it a try. We have them in A4/A5 sizes and Personal on A4, which you print out trim to size and punch. We also have files available for 2015 so you can double side 2014 and 2015 if you wish, just pop it through the printer again.