All good info so far. It too took me a while to get it all sorted out and understood. In addition to what others said, a few things.

A vor is a ground based transmitter that you tune in the aircraft radio on a select frequency. Then when you want to nav on the next vor you tune in that ones particular frequency. But first realize that it is a ground transmitter, that happens to look like a big cone, and in the aircraft you are using the vor nav receiver to use it.

The vor is all based on radials; 360 of them that correspond to a regular compass rose. Picture a ring drawn around the vor and divide that into 360 individual radials. (045 northeast, 090 east, 135 southeast, 180 south, etc. all broken down into 360 degrees) The ground transmitter emits those 360 precise radials. In the airplane nav head you turn an OBS and when the needle is centered, with a FROM flag, it tells you what radial you are on. ANYTIME YOU CENTER THE NEEDLE AND GET A FROM FLAG IT MEANS YOU ARE ON THAT EXACT RADIAL ON THE OBS AND THAT IS YOUR POSITION IN RELATION TO THE VOR. Figuring out the TO and FROM part is all based on radials. If you twist the OBS and center the needle and it says FROM, then you are on the exact radial that the OBS reads. So if it said 030 degrees centered FROM it means you are northeast of the vor and means you are on the 030 degree radial. Now if you are northeast on 030 you must turn the OBS to say TO, if you want to fly to the station. Then it will read 210 degrees TO. So if you want to fly from your present position northeast (on 030 radial) direct to the vor, you must turn the aircraft to a heading of 210 which is south south west to get to the vor station.

Its pretty confusing in the beginning but stick with it and it will eventually make sense. Just remember that the airplane can only be on any one of 360 radials at a time and use that to get your orientation in relation to the vor ground station. If you know where you are (on what exact radial) it makes it much easier to understand what direction you need to fly to get where you want.