You cannot currently add videos to your Quicklist from within your account page. To add videos to your Quicklist that are currently in one of your Playlists, follow the steps below:
- Click the "Playlists" link on your channel page.
- Click the "+" on a video you want to add from the list.
- Once your list is created, you can see the QuickList bar besides any video you watch.
Go here for more Quicklist info.