Maybe via the use of cookies, users could flag items as a "favorite." This would enable crafters in particular to select items for a custom list of favorite items. The favorites page would look exactly the same as a recipe page, only the list would contain their favorites. Could also be useful for people who might be using a lot of consumables to track how many are available on AH, or for people who are watching for particular item(s) to appear on the AH. Just a one-stop list of items people want to keep an eye on.