While my slide scanning is nowhere near finished, I am noticing the same things over and over again. Tips that you can take away from my experience, right now. For free. Well, for comments.
When you take 700 photos of the same event or thing, such as a cake, keep only the best shot. In 30 years the only thing your daughter will learn is that you were really really impressed by a mediocre cake. Or that cake technology has come REALLY far in 30 years.
If you are not planning to scrapbook, notate, or otherwise indicate what various and assorted pieces of equipment at NASA are, don't bother keeping the photos. Again, 30 years later, the only thing your children will learn is that yes, indeed, you did take an awful lot of trips to the Johnson Space Center. So many in fact that they have no desire to go. Ever.
Photos so over or underexposed that you cannot tell what they are supposed to be only serve to teach your children that you were not the best photographer. But they can provide hours of "magic eye" style entertainment. I think this one is supposed to be a giant reptilian ghost bird.
And the most important of all. No matter what you think of yourself, how you look, or how you appear in photos, someone someday will treasure having photos of you. This one made all the work worth it: