[mir]

You can buy a card index at your book store: Its a plastic container with a large number of paper cards. You can arrange them into categories separated with other plastic cards.

So, why not make a card index over organic reactions?
Write down the starting material, reagents, temperature, solvents, products etc and of course references to the original article, with folder adresse on your computer or on DVD...

What do you think about the idea? 

[Dan]

I say it's a bad idea because you will tend to just look at the reactions, instead of working through the mechanisms on paper.
It would be like revising by flicking through a textbook instead of doing problems.

[constant thinker]

I don't like card indexes for just about anything. I think french vocabulary (or other foreign language vocabulary) is the only thing that I've ever put on index cards.

I say this for much the same reason as what Dan says. Doing in my opinion is better than just looking at it. Also, I just simply tend to lose the cards, but that's besides what was already said.