How do get a list of businesses that don't have site?

You could get a piece of software (I'm sure you may even find that software here on WF) that can scrape both Manta and Yellow pages, then there is Craigslist (not as good for B2B but still worth a shot if they are able "to scrape any website".

Google places has now moved into the Google+ realm but I imagine that WOULD be a very good place to start too.

Not a great deal of help I know but there are only so many places you can scrape before you begin to scrape the same businesses. If you are in the UK then you could also try Thompson's Direct.

Hope that helps a little.

There is an old saying that goes "Where's there's muck there's brass".

If you are not familiar with this saying it essentially means if it involves rolling your sleeves up, getting your hands dirty and grafting there is money to be made.

I did a little analysis on this recently where I took a local paper and jotted down how many adverts were in the newspaper and how many had a physical web address listed within the advert. Around 50% of the adverts did not have a web address listed.

I am not stating 50% did not have sites but this was a good exercise. I would suggest you might be better of nearer to home with your own local papers and doing it manually. Once you have done these, get the local papers in a few additional regions and scale it up.

The open rates on an email campaign of this sort would be less than 10%, conversion less than one and you would still need a server with software of some sort to be able to send mail of this type and you could not load it up to aweber or the like as it is scraped.

Mailing would be expensive especially with the numbers a scrape tool could deliver. A physical location in the proximity of where you are based offering services to local businesses would be a far easier task to convert before potentially chasing down every man and his dog.

If you have already done the local paper route just ignore all of the above and pretend you did not read this

There are services that can provide you with lists. I've never used them personally but I am looking into it.

look up rus sells gscraper on the forum here.

Lots of scraping tools around that can give you information like that.
The latest one was the localizer lead tool, you should be able to find it and some more on the WSO threads.

Please let me know what pricing you get on your scraper software prior to purchase and the amount of contact data offered to see if I can get you better pricing for license plus data.

But you'd be a fool to underestimate the importance of what you don't do. With that in mind, we asked 16 business leaders and experts to share their own don't-do lists--the things they assiduously avoid doing or saying when going on sales calls, planning business lunches, motivating employees, and more

I have not find out yet but I it will be helpful if some one can come with the idea how to know about the companies not having there websites and there contact information.