Do your shadows have a mind or their own?

Do your shadows match your object? Sometimes an intentional juxtaposition of a different shadow makes the composition as it does here.

Tips for shadows:
1) Duplicate image (Control J) and fill with black
2) Tranform > Perspective (or just try using Alt change perspective)...Try to match other shadows in the scene
3) Make sure the shadow matches up to the base
4) Blur edges or add a Guassion blur filter
5) Decrease opacity to around 60%
6) Shadows will be more precise and darker the closer to the subject...Consider adding a gradient mask to get this effect