title_body: How can I cut down on superfluous Instapaper files on my Kindle? I regularly use the Instapaper service to send articles from my browser to my Kindle (Paperwhite if it matters). The settings allow for sending a new digest every time there are X new articles to be read. This works great if you regularly read and mark articles as archived before new ones collect. I don't. The resulting mess has always bothered me and I'd like a way to clean it up. There must be a better work flow; perhaps I'm missing something obvious.
  
  Is there…
  
  
  …a way to configure each digest sent out to only include articles not previously sent to my device?
  …a way to have the new digests replace all old ones so that there is only ever the newest complete set of un-archived clips?
  …some other way not to have duplicate articles in several digests on my device?
upvoted_answer: While Instapaper does not have the full capabilities you desire at this point in time, there is a way to cut down on the mess to get over 1/3 of what you want, mainly by eliminating any possibility for duplicate articles on your Kindle. Here's how:
  
  Note that regular Instapaper users always get 10 articles sent to Kindle. On Instapaper's Kindle settings page of the web site, you may select how many new articles triggers sending to Kindle. Choose 10.
  
  If you do all your reading on your Kindle and nowhere else (and you never archive any of the most recent 10 articles), then each Kindle digest will have exactly 10 new articles you've never seen before.
  
  I personally do 5 because I only clip to Instapaper once every few days and I'd rather get a digest twice per month rather than once per month. So in my case, I know that I can read the 10 most recent articles, and if I want to go back further I'll have to skip the previous Kindle digest which will have 5 duplicate articles. By skipping one digest, I get to a digest which has no repeats.