Been there, and after twenty years, I am still there actually :)
A bit of Zen wisdom might lighten the pain: most knowledge that are not technical comes from within. If one can understand and accept that, one gets less stressed about the number of books that are waiting to be read.
Remember that books are books, and some tips that make sense, are not practical. Of the books you mention, Getting Things Done, 7 Habits of Highly Effective People, How to Win Friends & Influence People, The Alchemist are the kind which I would call high-value books. However beware the 1-liner books. By them I mean the books where the author spreads something that can be summarized in one sentence, or one paragraph, to a book, with one agenda: Getting you buy the book so that he gets your money.
Learn to speed-read. Use the technique to eliminate the books that are of the second category.
Also try limiting number of books you put in your to-read queue physically. I used to buy books that I wanted to read. Now I just download their samples, and incredible enough, I buy very few of those samples, because when I am done with the book I am reading, I find another book better than the queued-sample books. Also, you might find that once you finish a high-value book, you are not the same person anymore. So probably the book(s) you thought would be great, no longer fit in well with the new you. (Here physical queue means buying a book. Once I buy a book, I feel obliged to read it. If I put it in a non-physical queue like a wish list or download its sample, I do not feel so obliged anymore)
Decide where your balance of Act vs. Learn is. By learn, I mean learn in theory. Beware that mastering the theory is not sufficient as learning. I would not wanna sit on a plane where the Captain had read all the books there is to read, and took all the theoretical classes, but this was the first time he was taking-off.
Practice makes master. However, doing practice, and making theory turn into practice takes time. So, in my opinion, it is a good idea to read a lot, and find certain things worth to practice, and practice those. It might take ages reading one book, practice it, then move to next one.
But read, read as much as you can. I cannot think anything bad coming out of reading the right books!