Great advice !
Ditto...
Not the same discipline in the Navy but I too stayed under the radar, did everything I was told, helped when I could, kept the trap shut for the most part and learned to spit shine a pair of boots to a glass like shine. Kept me busy and kept the cash flowing for polishing the other recruits boots as well.
Right before graduation, the Chief bumped me to E-2 and took me completely by surprise. Still have the paperwork somewhere..