Do you save your recipes? And if so, how do you organize them?

I don't have a hard copy of the recipes I've used, which I feel is inefficient. I usually resort to the internet to find a recipe as opposed to cookbooks. I'll bookmark something but I haven't organized the dishes by category or anything. So what ends up happening is I Google dishes I've made in the last, with only a vague recollection of substitutions I've made to suit my taste.

How do you guys keep/organize your recipes, especially those with substitutions?

Thanks!

bon appetit