Knowns and unknows for electrical

There are a few things that I feel comfortable with in electrical:
I feel confidant in finding opens, and that is going to look like a cut wire. You're not going to have any current flow in the circuit.You're not going to have anything at the load on the power side or ground.

High Resistance Voltage Drops are going to be a green corroded wire somewhere in the circuit. You're going to go to your load and not have something close to 12V on the power side and/or 0V on the ground side.

Here's what I need practice on:
Short to powers have always confused me. I understand that it's going to bypass a switch, and an example is you switch something off on the dash but it stays on. What to do after you identify that it's a short to power is where I get fuzzy. I understand that you use an amp clamp in the circuit, but I'm not really clear on the trouble shooting steps.

Short to grounds are a little simpler but still something I don't have a lot of experience with. I understand that it is going to blow a fuse, and that you should use a fuse that glows in it's place (ie a headlight).