One issue I've had with read-it-later apps is that I end up accumulating far too many articles and never actually reading them. Now my approach is simple: if I see something I want to read, I either read it immediately or never.
For me, this is just browser tabs. Modern browsers seem to do a good enough job with both persisting tab state between sessions and not expending tons of resources on idle tabs. So I just pop the article of interest up in a new tab and leave it there until I get back to it.