Steps in the Mesh-Current Method

1. Define the "mesh currents" i_a, i_b, i_c, ...

2. Write KVL around each mesh.

3. Solve the resulting set of simultaneous linear equations for the mesh currents.

4. If desired, other voltages and currents in the circuit may be obtained from the mesh currents.

Dealing with current sources:

1. Avoid writing equations that require the voltage across a current source.

2. Current sources directly relate mesh currents, and sometimes reduce the number of simultaneous equations.

3. Supermeshes allow you to write KVL around a larger loop (involving more than one mesh current). Then current sources "inside" the supermesh provide another equation to relate the mesh currents.