That's a HUGE accomplishment to have 2015 done - congrats!!
There are so many great suggestions here that mine will probably sound like echoes of them, but here goes...
I totally second
@Rikki 's suggestion to use Jaimee's Ready-To-Go pocket pages if you want to just get your album done
fast. They're already set up and embellished, you just have to add your photos and words. Someone earlier mentioned that you do hybrid pages, so if you need a space to stick "real life" stuff like graduation programs, I've found that using a pretty 8.5x11 binder (Target has some lovely ones) with a page protector for each month corrals the stuff rather nicely.
@klee73010 and
@carilyne 's suggestion is what I'm doing (I'm behind on way more than just 2016...and we'll leave it at that). I'm trying to work on multiple weeks per week, though first I need to get all of my photos culled (just finished last night) and at least some of them edited (working on that now!) for this to work. Since we're heading into the last quarter of the year, you'd need to do 4 PL weeks per week to be caught up by the end of the year.
Going through and just putting in the photos (+ words if you want to do those at the same time) and then catching up with filler cards and embellishments later (as
@cookingmylife suggested) is also a fab idea. I like batch processing in general, so I've been doing some other tasks ahead of time that will help make things faster now that I have time to scrap again. I decided to use just one template for each week (it's similar to Project Life's Design A) so that I don't have to spend time deciding which template to use for every layout. I've also gone ahead and made enough copies of that template for the entire year and labeled the copies with the date for each week. Then I can just drop stuff in as needed. I'm limiting myself to just ONE double-page spread per week. No extra "inserts" allowed for me! If I think an event needs an insert, then it goes into the stash of photos to scrap as a regular layout. I'm also limiting things to just one kit/series as I scrap. For 2015 catch-up I'm using MPM (combining the 2015 and 2016 kits), and for 2016 I'm using Jaimee's Storyteller subscription. Another thing that helps speed up the process is to just use one font, or just one font for journaling and another for titles.
I used to only scrap a month or two behind, as well, but I find if something "big" happens (for me its usually a vacation with TONS of photos) I get way behind. Lots of little (and big) things have piled up for me for the last 2-3 years that have made me get more behind than usual, and I'm looking forward to getting caught up, too!