It is very common that people will injure there bodies because they are on a rush, or are trying to do things quickly instead of the way they are intended to be done. The most common example of this would be low back injuries and arm/shoulder injuries. Here are some tips that you can use in order to prevent these injuries from occurring.
The first thing that you must keep in mind is to plan before you move something. Planning ahead will prevent awkward movements from occurring. Clear a path, plan how you plan to move object and then execute.
The second thing to consider is lifting close to your body. Keeping objects closer to your body create a more stable centre of gravity which in turn makes it easier on your body.
Bending your knees and lift with your legs. I am sure we have all heard this a million times but this is the most important thing that you can do. By not hanging in the back, but instead hinging at the knees, it takes a lot of the mechanical stress off the lower back. As a massage therapist in Calgary, I can firmly say that this is usually the most common reason I see patients who injure there low backs.
The fourth piece of advice is for you to tighten your stomach muscles. Tightening your stomach muscles will take 50% or more of the force off your spine. With only half the load seeing you back, you can imagine that the muscles do not have to work as hard.
Last but not least, if it is to heavy, get help. When you feel your body straining that is your body telling you that you are on the cusp of hurting yourself and you need to set the object down and get help.
If you can follow all these tips it will put you on the right track towards injury prevention when lifting.