Well typically when you pick a keyword you have your main keyword (Usually the one with the most searches or the best you think you can target)
If it's not the best target the best one as well within your article just to get some ground work on it (you'll want that one eventually right?)
Then from there just go with all the other related keywords without as many searches (Pick like 3 you don't want to overdo it you can always have more than one page)
Always remember though quality of the article comes first. If some of the keywords are making your article suffer... Cut them!
Good luck![]()