Sounds familiar. I wish the article had some sort of suggestion or hint as to what to do when you're really prone to anxiety. I have several very good options in my life right now and have made a tenative decision on what to do, but I'm finding I'm crippled by anxiety over my decision.
paulsutter gave a good answer to this elsewhere in the comments. But I would add this: All other things being equal (or roughly equal), pick one at random. Sure, there's opportunity cost, but there are also costs way beyond the time you take fretting over a decision. You said it yourself: You're "crippled" by anxiety. How is that better than making a random decision? Or just going with your gut?
I think it's naive to assume that simply making a random decision would remove or reduce anxiety. Anxiety doesn't only come from the fear of regretting your decisions; it also comes from the fear of receiving a negative outcome, even if that outcome was "chosen" by a coin flip or a third party. Hence people are anxious to receive news after a job interview, or a call about a loved one's medical condition, despite both having nothing to do with their own decisions.