FreshRSS on my raspberry pi. I admittedly don’t have a super good way to optimize my workflow regarding journals. I added Nature and intended to add more, including more specialized journals for my field, but its feed alone proved to be about as much as I could keep up with. If you’re in medical or life sciences, you could try adding feeds based on PubMed searches (there’s a “Create RSS” button under the search bar on the results page); you’ll get a feed of new papers that match your search terms. I don’t know what resources like PubMed there are for other fields and what they might offer in this regard, though.