How to use aperture to get a nice blur effect. The depth of field can make a picture go from normal to amazing. Try using this to better your photos, this website has a lot more helpful information. -JPH
In this video I’m going to show you how to create a blurry background in Photoshop (the shallow depth of field focus). We’re going to apply the blur by using the Lens Blur Filter which allows you to apply the narrow depth of field so that some objects in the image are in focus while others are blurred.
Follow these easy step-by-step instructions to get a blurry background in your photos. Keep your subject sharp & in-focus, and get a beautiful, soft buttery blur in the back. These tips can be used for both DSLR and point-and-shoot cameras. It even includes the "Best Recommended Lenses for Parents" (a.k.a. for taking pictures of your kids!)
How to Making a Blur Picture Clearer - GIMP Tutorial - YouTube