Seems a pretty good article, although a lot of it is also common sense, similar to how you would approach your CV.
I started up a LinkedIn profile about a year ago when I was changing jobs, got a new job when I was half way through it then never finished it. Should probably get round to doing it I guess.
One interesting thing to try - pick the job descriptions of 5 of the type of jobs you want.
Feed it into a Wordle - google this if unsure.
You get a graphic representation of the key words that are coming up.
Then you want the main keywords to be in your heading, subsection, titles, descriptions etc with great frequency- all about optimising your content to match what lazy HR people are searching on. Best of luck.