You and the Combat Order will become very familiar at TBS.  In fact, you'll probably write over 30 combat orders in your 6 MISERABLE MONTHS in Quantico.  Haha.  All grouchiness aside, here is a really helpful Combat Orders Checklist that was passed down to me before I headed to the BOC (Basic Officer's Course).  Use it to double-check that you've got everything you need . . . especially if you're the Marine holding the primary billet.
     Note:  If you print this double-sided, you can laminate it and bring it to the field with you!  But soon enough, you won't need to because you'll have this stuff memorized.