So now you are in the Army! HOO-AH! Here is some general knowledge about your environment that you may find useful.
TSP Guide: A quick guide to the saving for your future with the Thrift Savings Plan
Guide for Leave and passes: This goes over how to put in a leave packet, plus common types of passes and leave.
Off Post or On Post Housing: The short guide for making the decision.
Memorandums: A short but sweet guide. Download an example memo.
Commissioning Sources: The down and dirty guide for coming to the officer side
Pros and Cons of an Officer: What is good and bad about being an officer
Macro vs Micro Management: Let your Soldiers make some decisions.
Military ADSO Guide: Education, PCS, and Military Schools can add an Active Duty Service Obligation.