Some tips for taking a more professional photo is to first create a professional set up.. You SHOULD have some kind of torso mannequin, which will help..
THEN, get a background, usually a bolt of black or white felt will do - you can get this at a fabric store.
Then you set up in a room that is VERY VERY well lit. You do NOT EVER want to use your camera;s flash if you want professional pictures because most point and shoots have flashes that are too focused and bright.. that is USUALLY what makes things less professional looking is when people use camera flashes..
Once you have a good setting, you set your camera on a tripod or something that you can use as a tripod (I sometimes use a bookcase at the right height, ect) Also, MANY digital cameras now come with a remote for taking personal shots, or at minimum they have a 3-5 second delay. If you have a remote, just use this.. If not set the delay so when you push the button you dont move the camera and get a blurry image.
You should also go into the setting and set the ISO to something in the middle. The LOWER the ISO the more capable it is of taking a picture in the dark, HOWEVER if you go TOO low, the more grainy the image will be.. Usually a low ISO like 80 will take a shot in a dark room with no flash without any blur.. So that means you can use 800 or more since you will NOT have any movement on your camera OR your shirt.
I can bet that if you do this, you will get some really awesome pictures and you wont need fake pictures