Know your flash's range. This is a very important technical aspect, that is mastered by experience.
The tripod is one cumbersome accessory, and in many cases, it's just one of those items you don't want to lug along with you each and every time you're planning on taking pictures. However, even without the tripod, there are several ways to improve your photographing results, if you pay attention to your surroundings.
The Lazy Photographers Tripod
Let's say you're heading out for nice stroll, digital camera in your pocket, and you really don't want to carry that bulky heavy tripod. The first consideration is of course how to properly steady your hands while taking pictures. Most people use their hands when taking pictures, so it's not the end of the world if you have to. However, there is a right way and a wrong way to do it.
Even if you have steady hands like that of a surgeon, you'll need a little assistance when it comes to holding that camera perfectly still. For your best results, always hold the camera with both hands. Your left hand should not be grasping the camera, rather it should be supporting it, while your right hand has a solid grip on it. Use your chest to brace your arms and steady your hands.
When you're ready to snap the picture, don't press the shutter button quickly as this will actually cause the camera to shake slightly as you click it. Try squeezing the button slowly. As you squeeze you are entering a two-stage process. The first stage will lock in your focus and exposure and as you continue to squeeze down on the shutter button, the picture will be taken.