I am not sure there are titles that will ensure anything. Just like any direct mail or email marketing tactic, people get used to overused ones quickly and easily. My advice is not to use the same title every time, but craft each on to each person you are reaching out to. Trying to do guest posting en masse is not going to be worthwhile for you.

There used to be a platform for this called Sponge, but their site is down so I assume it's gone now.

Q&A can be very useful, but you will need to focus attention less on length and more on the capability to search the questions. More importantly if your market wants this and if it's not available elsewhere. If this is something that has been identified as necessary and useful, go for it. Don't worry too much about the headings and length. Just don't make this a factory of questions and 300 word answers. Allow the people writing the answers to answer well, no matter how long.

Hope that helps!

I would not recommend IP based redirects. You can detect and do an initial redirect (with a javascript overlay telling people that you think they are in a specific area), but you'd have to give all users (including Googlebot) the ability to go to the other URLs as well.

HREFLANG is not meant for geo-targeting and IP addresses only tell you location. You only need HREFLANG if there are language changes within a country targeted site or universal (not geotargeted) site.

Even ignoring that, the HREFLANG would not help if people were always redirected based on IP, so I don't suggest that.

Hope this helps, let me know if you have any more questions.

Both answers so far get to one of the points that I was going to make, always update redirects so that there is not a chain, but I wanted to add something else. You only need redirects as long as someone is linking to those pages. You should be taking time to fix any internal references to changed URLs and contacting websites that link to the old URLs and asking them to change the URLs. That should be a part of any site URL change.

If you have only revised your URLs once, you only need redirects for 3-6 months while the search engines reindex everything. In that time, you should have changed all links to the old URLs.

In your case, I'd drop all old redirects except for the last one and see what 404s you get. Find the referring site, and contact them to change the link to your site. Once that is all done, then you can work on this latest revision to change those links.

Hope that helps!

Tommy is getting to the point but things are still very confusing when it comes to international.

Can you go check out this flow chart, see what is best for your business, and then let me know? http://www.distilled.net/wp-content/uploads/2013/05/International-Search-Strategy-Guide.pdf

That should answer most of your implementation questions as well, but I want to make sure it make sense. So check it out first and let me know.

But if what I am assuming is the case that you have geo-targeted sites and there is no translation going on within the geotargeted sites (.com and .co.uk), then HREFLANG is not needed. What I mean by translation isn't happening in the site is that the .com (US) site isn't translated to Spanish or any other language. And the same in the UK. If no translation is happening within a geo-targeted site, HREFLANG is not necessary.

Let me know what you're trying to do with geo-targeting and international strategy and I can help better answer your question.

Go with the subdomain that is just targeted to Portuguese, the language. Use an HREFLANG tag to tell Google which pages are translations of an equivalent English page. This will allow you to get traffic from a number of countries that speak Portuguese. I am of course assuming that your content doesn't change other than the translation.

Don't geo-locate unless you mean to actually target a country. If you want to go after the Brazilian market with different content that is just for Brazilian citizens, then geo-locate. In that case you can use a ccTLD (those are only for geolocation), subdomain, or subfolder. That's up to you, but only when you are ready to actually geo-target your content.

I am going to agree with everyone here and add that while there are not "limits" on the other H-tags, they don't hold much value anymore. Don't use this as a "tactic" to rank. Spend your time on other things specifically on building relationships in your industry.