With Photoshop, beginner photographer's I would say less is more. Photoshop is only a tool in taking the shot, just like the camera. The software won't take it for you or make it beautiful. Only you can do that with your eyes and inner eye in mind. If you find yourself relying on Photoshop too much, then ban yourself from it for a month. Increase your picture taking and work on framing the image and moving your subject (or yourself) in order to pose and compose the image. Use vertical and horizontal lines to create a balanced and interesting photo or using converging lines to follow the eye to a focal point you want the viewer to see. The best practice is taking pictures of hill and mountains. Even though my images did improve in picture quality in terms of colour, the composition did not suddenly get better. It's the same with a camera, having a professional camera DOES NOT make you a better photographer. Only your eyes can get you that.
Practice. Practice. Practice.
That is the only way you can perfect/nourish a creative mind.
The subject you are shooting, how you pose them and how they sit in the frame with the light surrounding them will make or break an image, it's the basic elements that go into a photo is what you will enhance with Photoshop.