6. A system comprising: a computing system comprising one or more hardware computing devices, said computing system configured to at least: access contextual information associated with a browse session for a user, wherein the contextual information includes one or more attributes indicative of a user browsing context for the browse session; determine the user browsing context with respect to items available from an electronic catalog based at least in part on the contextual information; generate a candidate list of candidate digital content recommendation items for the user such that the candidate list includes (i) one or more items from a watch list associated with the user and (ii) one or more additional items not in the watch list, the watch list indicative of one or more items added to the watch list and when the one or more items were added to the watch list; determine, based at least in part on an amount of time elapsed between (i) when a given item is added to the watch list and (ii) when the given item is watched, a time interval by which to filter the candidate list; remove one or more candidate items that do not satisfy the determined time interval from the candidate list; and output one or more digital content item recommendations from the candidate list that does not include the one or more removed candidate items.
6. A system comprising: a computing system comprising one or more hardware computing devices, said computing system configured to at least: access contextual information associated with a browse session for a user, wherein the contextual information includes one or more attributes indicative of a user browsing context for the browse session; determine the user browsing context with respect to items available from an electronic catalog based at least in part on the contextual information; generate a candidate list of candidate digital content recommendation items for the user such that the candidate list includes (i) one or more items from a watch list associated with the user and (ii) one or more additional items not in the watch list, the watch list indicative of one or more items added to the watch list and when the one or more items were added to the watch list; determine, based at least in part on an amount of time elapsed between (i) when a given item is added to the watch list and (ii) when the given item is watched, a time interval by which to filter the candidate list; remove one or more candidate items that do not satisfy the determined time interval from the candidate list; and output one or more digital content item recommendations from the candidate list that does not include the one or more removed candidate items. 13. The system of claim 6 , wherein the computing system is further configured to: determine an average elapsed time across a plurality of users between (1) a respective user in the plurality of users adding an item to the respective user's watch list and (2) the respective user actually watching the item.