I make both physical pocket pages and digital layouts. My digital pages are all over the place. I scrap what I feel like and then file them chronologically in the albums.
I do try to scrap the pocket page albums chronologically, although I tend to jump around quite a bit in those albums, too. Generally, I'll start a month and work through to the end of the month, then I may pick a month for a different year to work on. Although, I guess I usually scrap through the years chronologically, too, I just switch between years.
I'd jump around even when I was making physical pages in Creative Memories albums. I tried to scrap chronologically, but ended up with lots of albums with sticky notes on blank pages. Thank goodness for 3ing binders; they've made my scrappy life a lot easier!