A lot of noobs start promotion with a plan of driving traffic to their website. Stress the word "web site", meaning a single site.
A big focus of this forum is to create lots and lots of web properties to get more benefits. I'm not as blackhat as some and I'm not totally whitehat either. I think there's a time for great content, but at the same time understand that Google doesn't really rank on content, bot rather SEO factors, especially links.
I also think instead of concentrating on a few keywords, your goal should be to use as many keywords as possible, in as many niches as possible. Every page, site and word has the potential to get traffic, give and receive links, etc.
IMO, it's all a numbers game. The more words, pages, links, blogs, sites, etc, the more likely you will get traffic and make sales.
Setting up multiple resources has so many benefits. If you buy marketing software like Bookmarking Demon, it's the same price if you bookmark one site or 100.
If it works, may as well do it 100 times. Each time you set it up you'll get faster and faster. The first time may take you all day...But by the 5th time, you'll be done in a few minutes.
If you only have one site, you'll really only be able to safely bookmark one page per account. But if you have 25 blogs, sites, articles, lenses on different IPs and services, about different niches, you'll be able to bookmark a lot of them for each account you create.
Also, you'll want multiple accounts on multiple bookmarking sites. With multiple accounts and multiple properties, you have tons and tons more unique combinations, and this will help go a long way to keep your accounts from getting banned.
The Glass (of Juice) is Always Half Full
Here's another important reason for having many different properties...You must remember this:
When a page has link "juice" it not only passes on all the link juice to the pages it links to, but it also keeps the link juice for itself.
Let's say you have a site and build 100 "link points" to the site. You have "link points".
Now I to have a site, but I also built a blog. I built 100 "link points" for the blog.
And my blog links to ONLY my site. Since a page not only passes on it's "link points", it also keeps them, so:
My blog has 100 "link points" and now my site also has 100 "link points", for a total of 200 "link points".
I did the same thing you did and got 100 "link points", but I passed them on and now have 200 "link points" while you only have "link points".
Next I build a Squidoo lens. I point half my links from my blog to my lens...Now I link the lens to my site.
Blog => Lens => Site
Blog => Site
Now I have 250 "link points" to your 100 "link points", and from the same linking effort.
And another important lesson: Links only pass on good link reputation, not bad. You've heard "don't link to bad neighborhoods", which is good advice...But if a bad neighborhood site links to you, you won't be hurt.
Multiple properties also act as "multipliers". If for some reason you're afraid of getting more than 100 links a day (for example), if you have 10 different properties you can get each 100 links a day...
And as we just learned, each will pass on their "link points". This means we can still pass on 1000 "link points" a day to our main site by getting each of our other sites 100 links a day...Plus each of these sites keep 100 "link points" a day.
Sites like Twitter will allow you to add and delete so many members a day...In my experience, it's far easier and safer to set up 10 Twitter accounts and follow 100 people a day for each than it is to follow 1000 people a day on a single account.
-Boom boom boom boom.