I generally don't do much to a photograph after I've taken it. Once the shutter has opened and closed, I consider most of my task complete.
One thing I will do to post-process, especially when photographing knitting is to crop the picture. As my somewhat limited abilities go in the world of photography, I think that framing is a key part of the package. With cropping, you can re-frame to change the dynamism, remove unwanted visual clutter, or just plain old clarify the object of the picture. Plus, it's fast and not complicated.
My shallow depth-of-field lens is a 50mm fixed-length jobbie. Get yourself one. It will only set you back $100-$150. You can take a lovely, artistic image of any (stationary) object in just about any light. However, the fixed focal length means that framing isn't easy. Especially because the nearest focal length is something on the order of 1/2 a metre. I want to take this picture (from yesterday),
but instead I have to take this picture:
I cannot get any closer to the thing and have it in focus. That is the maximum amount of space the swatch can occupy.
I admit, I like them both. But one is a picture of knitting an the other is just art. You only see the shape in the real, uncropped picture. You don't see the knitting. Since I was trying to show images of knitting yesterday, the cropped photo was the choice I made. If I were trying to express something ... enigmatic (but not to do with the craft of knitting), I would be better off choosing the uncropped.