Do you use Pocket? Do you save a ton of bookmarks in it? Do you intend to "read it later"? Do you? My answer is "Yes" to all of them. Sometimes I do "read it later", but most of the time I don't, and all these treasure just sits in Pocket.
The solution (my humble hypothesis), is to send myself one or a few of these forgotten bookmarks everyday through email so that I'll be reminded and encouraged to read them.
In fact, this would not only be useful for finally reading those bookmarks that I have yet to read, it'll also be interesting to reread some of the bookmarks that were saved (and read) in the past, and see if I would gain new insights from rereading them again, as described by Paul Graham.
Read and learn again.