Yes, I have some advice:
1. Proof-read what you write. Quality standards for written deliverables are significantly higher in consultancy than you are used to, I'm sure.
2. Be less presumptuous. By saying "which is exactly what I'm going to do", noting in particular our current economic environment, you sound like one of those many candidates who wish to join "an esteemed firm" because they are "ideally suited to strategy consultancy". Please keep your affirmations inside your head; the rest of us do not share the need for this type of reinforceent of your self-esteem and self-confidence.
3. Buy a big tub of vaseline.