This is the cheapest, easiest thing you can do to be prepared and be safe in your training. Now the study has to be purposeful, and for that your instructor can direct you. What to study and when to study is important. You can get too far ahead in your reading. I think the best way to study is to read to prepare for your lesson, do the lesson and then read the same material again (and again for that matter). Since flying is not like anything else reading alone will not prepare you fully for the physical tasks of flying.
Now there is soo much information available, so make sure with your instructor that what you are reading is helpful.
previous entries in blog further describe the points below
#2 register with the FAA
#3 Join AOPA
#4 Find your best club/school
#5 Find your best instructor