I created a folder on my computer with several sub-folders. Some recipes are typed since i copied and pasted them from online sources, others are just scanned as a PDF file. I love that there is no paper to lose and it organized into categories such as mains, desserts, breads, sauces, sides, veggies, etc. One afternoon at my parents I scanned tons of my mom's old recipe cards. Scanning the old recipes has been great since I never have to worry that i skipped an ingredient or transposed a fraction when writing/typing. When I am ready to make a recipe I just print it out, put it with my shopping list and throw away at the end. No need to worry about spills or loss.
I have even given Mom back her own recipes. She can now blow up her own recipe cards when printing which makes it easier to read! She rarely uses her recipe box anymore simply because finding what she is looking for is so much easier on the computer.
Having the old scans is also a little nostalgic. True she still has the originals, but I love that some of my recipes are still in her hand writing. Having them electronically also makes it easy to share with friends and family. If someone oohs and aahs over a dish I just pop on to the computer and email it over.
PS - for those worried, my computer is backed up so there is no worry about losing all my recipes.