The Rule of Thirds is an essential compositional tool for photographers to understand – you can read all about it on Wikipedia and numerous photography sites. Like all rules it can be a bit constraining, so it’s also important to know when not to use it! In transport photography using lead in lines may be more important – though the resulting image will usually meet the rule of thirds regardless. For example…
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In sports photography, football for instance, the rule of thirds is often one of the first things to go out of the window, though this shot comes close to obeying it…
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But when your subject is posing nicely, you have time to concientiously follow the rule…
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Sometimes you can get a balanced Rule of Thirds shot like this one showing a passing conversation between two people…16201834257_ed82902f22_b

As for Bokeh… It doesn’t usually have a place in my type of photography, though football is normally photographed with limited depth of field to make the players stand out from the crowd. I think it’s something for the Flower Portraitists to demonstrate as it is definitely a part of their discipline 🙂

You can read about the Weekly Photo Challenge at https://dailypost.wordpress.com/dp_photo_challenge/rule-of-thirds/
& you can see a good demo of Bokeh at http://blog.thepanamaadventure.com/2015/03/23/weekly-photo-challenge-rule-of-thirds/