One of the ways I like to study, is by printing out a picture I like. I then take the time and trace over it. Now at first this might sound like a big waste of time but it isn't. Sometimes the mind seems to trick us into thinking a certain line or shape is different than exactly what you see in front of you. We sometimes see what we want to. So with having the added sense of feeling, of going over the same lines that are there, you are able to see and feel the shape, length, direction, thickness, rhythm of each line. You will start to feel the design. You are adding another sense while studying. It's kind of like what a blind person would do when they touch things. They are using the sense of touch to see. Well when I trace over a picture, I get that added help of seeing by feeling the drawing as well. My drawing skills grew when I started doing this. So don't be embarrassed to trace over things, you will learn a lot.
The next thing I do is make sure I am studying good art. There is a phrase that says "Garbage In Garbage Out".
Meaning... if you are looking, studying or around bad stuff (in this case art) you will absorb it naturally, and then when you put pencil to paper that is what will come out. You can only produce what you know. So if you would like to be a great artist study great art work, be surrounded by it. Study just the good stuff.
One more thing... Glen Keane once said "if you are drawing a blank, or are having a hard time drawing a certain thing, then it is because you have not studied it enough". You can only draw what you know. Sadly there is no magical dust (believe me I have tried searching for the stuff) that will make you a better artist. The fruit of great art comes from the roots of studying, observation, and hard work.
So for people like me that have a hard time drawing hands this is the type of (Great) artwork I would printout, trace, study, and observe.