1. Hit the streets running, making sure that the phone gets answered by a live person, with someone to give them a price ASAP. "Sold and scheduled" is much more important to get lined up than getting the truck headed to the fattest neighborhood first. When answering a call for a bid, feel free to knock on a couple doors nearby and leave a card, especially if the homeowner is outside looking at their mess.
2. As mentioned above, take care of the emergencies first, but take the time to sell quality work at a reasonable price.
3. Set a schedule with every sale. Tell them when you will be there, and take the time to remind them occasionally that you are still coming.
4. If there is a heavy work load, book yourself no more than 75% full time. This will give you some time to add smaller side jobs "while in the neighborhood", and still leave time to honor your commitments. Not much hurts your reputation (and your wallet) more than loosing sales due to broken promises.
5. NEVER gouge the customer, just because they are willing to let you. It isn't always stormy, and the customers will remember.
6. If they DESPERATELY need emergency service, I am not above asking them to pay extra for overtime or urgent service. Then I can afford to negotiate with other more patient customers for a reduced price or other concessions so that they will release us from showing up when expected.
I will always advise my customers that they need not make a decision right now, that they are welcome to compare prices to other vendors. I let them know that we can squeeze them into the schedule XX days after they call us. Then the gouge artists and the storm chasers come into the neighborhood; they generally call me and ask when we can start.
I have a very high closing percentage for my sales bids, and not always because I am the cheapest. Rarely, I am the highest bid, and they still pick our company!