Past couple days I've just been shooting random stuff, trying to get a better feel for my camera. When I upload the photos to my computer a lot of them turn out blury, but when I take the pic I don't feel like I'm shaking or moving the camera to cause this. Other photos seem to be fine. I try to keep the shutter open as little as possible to prevent this, but even at 1/4000 I've had a blury pic. Is there a way to help prevent this with out a tripod? I do plan to get one, but I wont have it with me all the time. Wont have my camera with me all the time either but will have it with me more than a tripod.