Jeff Kross wrote:...an equally (and, from my perspective, certainly more pleasurable) method for improving your sight reading is to get some anthologies of simple, single line works (Bach is good for that) and just read through them. Pick a new piece every day and read through it. Guaranteed to improve your sight-reading over time.
Agreed. Additionally, you can get a book of "easy" guitar duets and practice sight reading each part individually, so you get the bass strings and also the treble. You can sight read up an octave, down an octave (where possible). You can sight read in 0/I position, and again in IV, or VII position (depending on Key). Finally, you can sight read up a fourth, so you would play a C note as a higher F, etc.
If music be the food of love, play on. --Shakespeare, Twelfth Night, 1.1