Question about credit score... simple question?

I have had only 1 acct charge off, credit card for 500... i am going to do my best to get 1 of my credit cards down to 30% and the rest around 50%...I only have 3 revolving accounts. but I noticed that I have an account that is open with a zero bal with a credit limit of 1200. Will closing that account (because i dont use it and never will, a value city furniture acct) boost my score a little bit? It shows paid in full, no lates.. just open