In last two years I made sites (just arranged the content, not the programming) for over 50 bookkeeping services, and with my new concept I got better conversions then with my first concept.
When it comes to customers you get different types of them, I ordered mine like this:
a.) customers that want to buy right now, that's why they are on your site
b.) customers that are on your site because they think that they need it, and want to find out why they need it
c.) users that will need your services in the future
d.) users that are on your site just because they liked the commercial, but they maybe know someone that could use your service.
Customer A needs a payment/contact/call form right away, in the same second they open the site, you will lose them if it's hard to find
Customer B needs an explanation of your service, the same second they open the site, if they don't find it, you can lose them.
Customer C needs to see that you are professional and that you are taking efford in your business
Cusomer D is the one that you don't have to care to much because the conversation is very low, but you should leave the best opinion on him, that's where the design and the whole presentation comes in. Also, I like to add a line on my site "Know someone that could benefit from our service? Send him an e-mail right away! E-mail form"
In the end, I got something like this:
Would like to hear your opinion to

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