This year's planner setup will continue in the same manner as 2015 finished. I think I have (finally) found what works for me. I use a Traveler's Notebook, even though the spelling bugs me just a teeny bit. As I refer to it as a TN, I can cope.
I use the standard size and this fits in my bag just fine. I made myself a laminated dashboard, but have recently removed that, as I didn't use it.
The basic setup is this:Home-made week to a page diary. This is joined by a connecting band to a standard Midori blank insert. Wrapped around the diary only is a Midori credit card insert.These two inserts are slipped under the band. In the middle of those (the standard three-insert setup) is a Monthly Plan Pack which I settled on midway through last year. Do check it out, it's very useful, particularly for someone who works in an office. Tucked under all three of these inserts are a Midori zip insert and a Midori Kraft folder.
Of course, in addition to this I have several fauxdoris that I have made. One holds some spare A5 booklets, another (wide TN) how some Moleskine Chapters inserts & the third is a Field Notes size & has some pocket Moleskine booklets in.
Those three were just some practice pieces I did. My other cover in daily use is my Roterfaden Taschenbegleiter. I have an A5 one and I still love it. I would switch from the TN, except that this is too large to take everywhere and the A6 size is too small for me. So, it is my desk book. I have a Leuchtturm book in it that I keep work project notes in, a Rhodia notebook for, well, making rough notes, and a Zentangle booklet I created, which contains a pattern reference. That stays in there and at weekends the work book comes out and a sketch book goes in.
Ideally I would keep my daily journal in the RT, but I haven't been able to find the right one. I use a hardcover page-a-day A5 diary, which doesn't fit.