Collage & Keep
Photocopy material to avoid destroying the original, especially precious things like old photographs.
Get a good craft knife and replace your blade regularly.
Photograph items you want to include and print them out.
Use a strong glue stick. Cheaper ones will come unstuck eventually.
To start your own collection of ephemera, keep your eyes peeled in charity shops and flea markets, as well as online.
If you need to cut a shape out of a page, slide a cutting mat behind it first.