Well craftsy stuff can be tough, especially if you're not a sentimental guy and don't save/remember things, and since she already did the collage, it might seem too similar, but you could always put together a scrapbook. Even if you don't have little mementos saved, you could re-aquire some. Like go grap a napkin/coaster/menu from the restaurant you had your first date at etc. Go print a newspaper headline from your first date or kiss or whatever, grab the box score/headline from the first C's game you went to, get a piece of Coach shopping bag or tag for the gift you gave her last year. Easy if you're good at this stuff (save things, remember things), not so easy if you're not good at it.
Now if you want a great idea for something to do next year, I got the perfect idea for you. Start a journal just about her, don’t have to put much down, just jot a thought or two down about her every week. Now's the perfect time to start because you can capture your thoughts leading up to the proposal, and then capture your thoughts leading up to the wedding, with a lot of little random things added in:
Tuesday 9/4/12
Got the reservation set at your favorite restaurant, hope it's a special day. Don’t worry, getting ready to propose in December, already got the ring picked out, but still want this anniversary to be special.
Friday 10/5/12
The spaghetti you made tonight tasted so good, loved it.
Thursday 12/13/2012.
Heading down to NYC tomorrow night, proposing Saturday. Even though I know you’ll say yes, still never been more nervous.
Saturday 12/15/2012
Argh, can't believe there's a massive blizzard today, completely ruined my plans to propose, you would have loved it too, was going to do it in front of the Christmas tree in Rockefeller Center, been planning it for months too. Now I gotta come up with a Plan B quick.
Friday 1/18/13
Went to go see Hunger Games 2, didn’t really like the movie, but you were looking so good in your blue Old Navy sweatshirt.
Saturday 3/2/13
We went cake tasting today, after arguing about the food and the flowers, glad we finally agreed on something.
Sunday 3/10/13
Got the honeymoon booked, I just know you’re going to love Cabo. Can’t wait till we're relaxing on the beach and the wedding planning is behind us.
Thursday 4/11/13
Nothing I like more than sitting on the couch with you watching 30 Rock.
Super simple, just takes a few minutes to jot some thoughts down every now and then, and she'll love it, and part of the beauty of it is you thought so far ahead to start this over a year ago and how long it took you to compile the whole thing. Would make a perfect birthday, valentines gift, first anniversary present, etc. So simple, so easy, so inexpensive, and it will probably be one of the gifts she remembers most.