Ahh now this is the whole thing about quilt making. This all just takes time. What were you thinking when you bought them? Did you have a quilt in mind? The fabrics usually have a web site to give you ideas on how to set them together nicely.
Here is what you need to know no matter what blocks or fabrics you decide to use. You should use a large, medium and a small, soild or blender. Then your blocks will have scale and interest. Then you need to concider the value or deepness of the colors. Pick say the pansy for the main fabric and pull out two or three that will compliment that for your blocks.
Pick a simple block at first to see how these interact.
Maybe a sampler quilt would be good for you to learn how these all will change with each block. The other way is to take small snippets and paste a small mock up block onto paper. That EQ7 program does much the same thing, which is what many of the girls here use to design with.
Failing all that ... Find a quilt that you like that has simular fabrics and make that one.