Photo by Scott Bourne
If you want your photos to pop, make sure to adequately distance your subject from the background. The further from the background the better.
In the case of portraits, I try to maintain a minimum subject-to-background distance of six feet. 10 feet is optimal in most situations.
Of course focal length, lighting and lens aperture play a part in how the results look, but by having a starting point, you increase your chances for success.