I would certainly make sure u pick some interesting electives, like exchange/SQL or ISA.
The self study guides are good, but there are other great publications like sybex and syngress out there. it all depends on the exam. join this below forum, these guys(fellow IT pro's) offer great advice on which books to take for which exam
i am also preparing for the 70-270 exam.
i got the mspress book. i think ms books cover everything. this is a good start for a beginner. then you must consider purchasing anotker book (think of sybex) to have a global idea of the subjects.