Like most things in aviation it's about practising procedures until they're second nature:
Start with selecting and indentifying the VOR you want to use.
Then decide whether you want to use it for establishing a position or whether you want to fly to it.
If you want to establish your position then twiddle the OBS knob until the FROM flag shows and the bar centres, read the radial FROM the VOR TO you off the top of the dial. From the compass rose on your chart you can then draw the line you are on.
If you want to fly TO the VOR twiddle the OBS knob until the TO flag shows and then read the (zero wind) heading off the top of the dial and turn to it. Thereafter you can work out drift by following the needle, if the needle is out to the right you need to turn to the right and vice versa.
Hope that helps (it did for me!)