In any photography business, it's 80 percent business and marketing and 20 percent shooting. That's why after 4 business and marketing oriented resources, I'll finish this top-5 with a creative resource. Frank Doorhof, himself an example of a highly successful photographer, has included his 100 minute Mastering The Model Shoot on Location video.
Normally, this resource is $35 by itself, now it's included in the Complete Photography Business and Marketing Bundle 2017.
The total value of this top-5 alone is $473. But there's plenty more. In fact, let me give you one more tip myself. 10 percent of the sales of this bundle go to charity. But during checkout, you get the option to double the charity amount (It's called 'Charity Match'. This will cost you only $19.47 extra and if you do, good karma will come your way by way of some extra free content, like Serge Ramelli's Interior Design Photography Bundle (a $147 value by itself), Kevin Kubota's Lightroom Presets Workflow Collection (a $49 value), Blake Rudis' Beginners Guide to Photoshop Actions ($29 value). The 5 Day Deal is a no-brainer and the Charity Match option is a no-brainer within that no-brainer.