This seems like a simple post. A bit out of date for this blog,whose readers for the most part, know LinkedIn well. Heres the thing, the more LinkedIn profiles I look at, and the more books I read on the topic, the more I see it needs to be said.
LinkedIn is increasingly becoming driven around the internal search engine, and most of the books are giving information that is out of date. Many a social signals service consider it outmoded and are impinging onto better alternatives. Some of the trainers are selling training that doesn’t quite match the way the channel works.
One of the problems with LinkedIn, (and I love the channel), is that they change things in secret. you might get an occasional notification if you dig really deep in to the channel, but mostly it’s a secret.
I’m also not convinced that many of the LinkedIn staff actually use the channel very much. Following some of them on twitter, the advice they give tends to be about the way the channel was 18 months ago, and not the way it operates now. that said, there are some great people who work there, and it is still the number one referrer of readers to this blog.
My 3 tips for being getting recommended either as a connection or for a job when it is posted (and that’s when you really want to come to a recruiters attention if you are jobseeking) are based on how the matching engine works, in order:

1: Location.

Results are weighted to those closest to the search. Advanced searches by job seekers or recruiters are also usually set to the 25 – 50km radius banding. Set your location for where you are recruiting or looking to work, not where you live. If you are working in london and hiring for Moscow, your location needs to be set at Moscow, for now at least.
2: Skills.

The skills section was launched after the 100% complete notification, but if you haven’t completed this section, and many haven’t, then you are really 60% complete. don’t be deceived by the 100% rating, it’s a lie. Use as many skill combinations as you can. Less is not more!
3:Job Title.

Don’t try to be creative here. Search for the titles that are most searched for or advertised in jobs, not what your job title might be. Don’t expect anyone to search for a candidate who is unemployed or in transition. People search for common job titles. If your’s is strange, unusual or funky, you are not going to come up in a search. I know mine says “Conference Disorganiser”, but my profile is set up for something different. If you want to be found, go with the common, whatever it says on your very large business card. When was the last time you searched LinkedIn for a Ninja?

These are 3 simple tips, but I wanted to share them for those who might need them.
Anything else you would add?