Step1
Keep your originals, no matter what. Even if you transfer the film or video to DVD, keep the film. It lasts a long time--longer than video and DVD formats.
Step2
Label your films and tapes. Include the title, date it was shot, where it was shot, the type of element ("original 8mm film" for example), your name, address, and phone number. Then keep a separate sheet of these notes in a plastic bag next to the materials or in a paper or computer file.
Step3
Store the films or videos in a cool, dry, dust-free place where the temperature and humidity won't vary much. Would you store a bag of flour there? No? Then don't put your film there. A cupboard or drawer in your house would work--the hot attic or damp garage would not.
Step4
For film: store them in plastic cans or coated metal cans. then lay the cans flat and don't put too much weight on them (air needs to circulate). Cans are available where film supplies are sold, or check the internet. Store 16mm film on plastic cores, not on reels, because over time, the reels will cause spoking. As for 8mm and Super-8mm films, they do best on plastic reels and inside of cans and keep them in their original boxes (you probably wrote info on the boxes already, right?)
Step5
For videotapes: store them on their spine, not flat. Keep them in plastic cases and away from magnetic fields.
Step6
Make protection copies. Store the duplicates at different locations away from your home, like at a friend's house or at your workplace. Be sure they are stored correctly there, too. Make sure they are labeled so they're not thrown out by your well-meaning friend or the efficient janitorial person.
Step7
Copy your films to video or DVD. Try a place that specializes in transferring. Check out www.homemovieday.com for a list of transfer facilities. And hang on to the original--DVDs are not indestructable. You've seen DVDs that have skips in them due to a scratch.
Step8
Copy your videos onto DVD. You can make subsequent transfers from the master DVD without loss of quality. If you have a lot of home videos, you can buy a machine for a few hundred dollars that will allow you to transfer them all to DVD in the comfort of your own home without jobbing it out.
Step9
If you've shot on digital (DV-cam, mini-DV--which have thin and fragile tapes), you can make a DVD copy. In fact, make copies. Plural. Give them to the relatives for souvenirs, and voila, you've got back up storage.
Step10
Consider placing your films and videos at an archive. There are archives that actually collect HOME MOVIES. The mission of an archive is to care for and store these materials well--and they will store it for free. They may even make copies of your films for you. Check out archives all over the world at www.loc.gov/film/arch.html.