After my miserable experience of failing the BSCI 3 weeks ago (after 5 months of study) I think I found the one thing that will push me over the top: flash cards.
My weakest area on the test was multicast and BGP. So far I have created a set of about 50 detailed multicast flash cards with verification commands, concepts, etc. and I finally feel that I am beginning to wrap my brain around this finally.
I believe this, coupled with the Authorized Self Study Guide and Doyle books, are giving me the edge. Can't wait to get back into ring for a rematch...