Selling Advice

I am looking for a little advice and figured this was a great place to get some.
I am an account manager for a computer reseller and wanted some advice on selling. I'm sure some of you handle or influence the purchasing for your corporations. What questions should I be asking and what is the best way to get into a company? What do you look for in a vender? I don't want to be an order taker. I want to find solutions that work. Thanks for letting me pick your brains and hopefully make me more successfull.