By default, new stories are added to the bottom of the backlog because they should be lower priority than the older stories.

Create a preference that puts new user stories at the top of the backlog view as the highest priority because the new stuff is more important than the old stuff (at least that's what our PO thinks).

This approach has been validated by tv - setting up a new series to record puts the new series at the top of the priority list in dvr, even if you start adding series to the new dvr by inputting the most important ones first.