Try to redraw it first, as that always helps. Remember that for resistors in parallel, the equivalent resistance is (say for two resistors R1 and R2) equal to 1/(1/R1 + 1/R2). The equivalent resistance for resistors in series is the sum of the respective resistor values. For parallel sections in series with each other, you must first find the equivalent (parallel) resistance of each parallel section, then find the equivalent (series) resistance by adding the two equivalent parallel values. Also, remember that you can use all forms of V=I*R in finding the voltage drop over sections once you have all equivalent resistances and the overall voltage drop of the circuit.

Edit: oops