I just make sure that I hand curate any links that I post. So I never "automate" the selection of links, that is an entirely manual process. In that way I can be sure that I only ever post stuff that I really like and that I never double post anything.
If you mean how do I stop tweeting the same thing that someone else tweeted... I wouldn't know how to go about doing that...
If you mean how do I stop tweeting the same thing that someone else tweeted... I wouldn't know how to go about doing that...