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You are asking a great question. My suggestion would be to forget about SEO and write the content in the way that would make sense to you as a professional and also in a way that you really think your end consumer would like. SEO is basically a method for Google to try to figure out what people would like the most and rank those sites that seem like they would be more appealing to the people who are searching for similar terms. So I highly suggest you totally ignore what SEO tactic you should use for your content and focus on how to make your content better for your visitors.
Let me address one technical thing though; what you are asking some refer to as Siloing. Bruce Clay has a well written article about this that you can find: http://www.bruceclay.com/seo/silo.htm . This will help you understand how you should restructure your content in a way that is easiest to understand for both the consumer as well as the search engine. I would probably be able to help you more if I knew what your website's structure looked like but I hope this gives you some general guidelines. Good luck to you!

Ashkan Sobhe

Bob,

My first question would be what are you trying to get +1's for? Is it for your domain, specific link or something else? We wanted to have more +1's for our site, so we added a +1 button on our homepage so people could +1 it on the fly. It worked out and we now have 41 +1's more than before.

Also, what we have found is that an incentive doesn't always work. It's a bell-shape-curve and after a while it will actually have a negative affect. I agree with Peter, sometimes all you need is great content but what I do strongly believe in is reminding people to do it. You could be on Yelp but if you don't tell people you are there and the fact that you appreciate their feedback, you won't get as many reviews. Same thing with +1's. Let people know you would appreciate the love, if they enjoy reading your content and they can decide if they want to +1 your link or not. If it is good content, it will work every time.

Add that button to the target, it works like a charm. If people see it, they will remember to do it.

I hope this helps.

Best,
Ashkan Sobhe