For my mom's 80th, we did a scrapbook, with everybody taking a 2-page spread. We got the kind with plastic sleeve pages, so everyone (several families - her kids and their kids) bought the background pages they liked, and then put in photos, a letter, captions and those little stick-on embellishments you buy at the craft store. You don't have to be too crafty to do it.
For her 90th, we did something for just our family. We wrote a list of 90 Things We Love About You and typed them into a template available on Shutterfly. There are other services that do the same thing. They give you templates and you can have any number of items on one page, other items on the next page.
We uploaded a few photos, for the cover, inside cover and on a few of the pages, and then everyone was responsible for a certain number of things. If you have 2 kids, for example, each kid could do 15 things and so could you and your husband - that's 60. Those would be individual memories, or "I love how you...." and "I remember how you...." sort of statements. Put a photo of her with each kid on that kid's pages, or a photo of the remembered activity or trip.
The remaining 20 (which would bring your total to 80) would be group things - a trip you all took together, something funny she always says, her recipe for X or Y that you all love, and so on. It takes a few hours, you pay your money, and it comes in the mail. It's one of a kind, and she'll love it.
It took me almost as long to write this as it would take you to do it. Message me if you have questions and I'll send you the links.
And before you submit this for printing, be sure to have a 3rd party proofread it for you!!!
Good luck!