This is just a quick note to people that use Anki 2.0 beta (link to beta at bottom).
Below is a screenshot of a question asked for the first time:
If you completely missed the question, hit 1 (again). If you felt comfortable hit 2 (Good). If you recited it word for word, hit 3 (easy).
Now this is every important. The next time you get the question, and get it right, press 2 again to promote it just one level (or else you will promote it straight to the top if you press 3). Example below:
The trick is to use 1 and 2 to promote/demote the card. Use 3 to keep it in the mix and make sure you retained it when you see it 4 days from now.
I hope that helps. I was having some frustration with it today so I thought this would be helpful. Let me know if you have any questions, I plan to do a full Anki guide for medical school at a later date.