So the basic rules:
1) keep it simple-watch your backgrounds for unwanted clutter, use props that bring the focus to the subject and not ones that become the subject. Remember you are taking a picture of your subject and not your surroundings
2) rule of thirds-keeping the most important parts of the image along the intersecting lines of the thirds-see example-avoid placing objects of interest in the center.
3) eye travel-when you look at an image pay attention to how your eye travels, the more you do this the easier it is to see. When you are composing your shots watch for leading lines-do they lead into the frame or out of it? Where is your negative space is it in front of the eye or behind the head?
4) Point of view and angles-pay attention to the angle you are shooting your subject and ask yourself is this a snap shot position or a portrait position? Is the angle you are shooting at flattering to your subject?
Okay so your homework assignment(s)-I hope you are reading this because I am changing it just a bit.
1) ABC word creating interesting angles and compositions also paying attention to your exposure and focus, take pictures of objects that create letters see here for examples. Create a word and submit it for critique on compositions, focus, and exposure.
2) take one object and shoot it from at least 5 angles/directions/depth of view send me all of them and the one that you like the best and why.
3) send me at least 3 other images for composition critique