So here are some of my ideas about how to optimize this new outpost.
Customize your ring tones so you to know right away who is calling. Try to use a specific ring for customers so that you are prepared and up for the call. Use a song that gets you in the right mood to answer a call from a customer. Use another ring tone for people who call you and typically waste your time and energy so you know that you can skip those when you are on a roll.
Get a headset or earphone preferably with noise cancellation technology so you can have a conversation no matter where you are without interference. I use the Jawbone and it works very well but there are others that I have heard are great as well. The stereo headphones that come with iPhone work pretty well too since they are in both ears but I don't think they technically have noice cancellation.
CRM on the phone. My company uses Salesforce.com and I know that this is available on the iPhone and I know that Siebel was available on the Blackberry when I was at IBM. This is definitely worth it at a reasonable cost if you are usually taking calls from customers or prospects on your cell phone. This way you can look things up in real time while on the phone or update the record right after the call while it is fresh in your mind.
Keep a presentation on your PDA or better yet a demo because you never know. Make sure it is a good presentation i.e. graphics, photos and etc. Not a lot of text. As a matter of fact, I would argue if the presentation doesn't look good on an iPhone it won't at a larger size either. Better yet get a demo on your phone. My software is used to automate contracts through a browser-based interview and it demos very well on a PDA. Soon we will be coming out with an iPhone version as well so it works out very well. Try it. Get a teenager you know to write you an iPhone App.