You can do either, depending what's more feasible. Lets start with
scenario 1, going to the switch first.
You have power going to the switch. At this point you can do 1 of 2
things. Run a 3 wire from the switch to the light fixture. The whites
in the switch box will be wired together. The blacks will be tied
together, in addition it will be connected on 1 side of the switch.
The red wire will be connected to the other side of the switch. At the
light fixture there will be the 3 wire and also a 2 wire feeding your
outlets. The whites will be tied together and also connected to the
light fixture. The red wire connected to the other end of the light
fixture, and the blacks tied together. The other option you have is
just simply run a circuit from the switchbox to the outlet and just run
a 2 wire from the switchbox to the light fixture.
Now for scenario 2, power at the light fixture. Its very similiar to
scenario 1. Just run a 3 wire from the light down to the switchbox. at
the light fixture, the whites will be tied together and connected to
one end of the light. The blacks tied together, and the red connected
to the light.
at the switchbox, there will be the 3 wire and a 2 wire feeding your
outlet. The whites tied together, the blacks tied together in addition
it will be on 1 side of the switch. The red will be on the other side
of the switch.
The other option you can do is if power is going to the light, just run
a 2 wire from the light to the switch for the light control, and run a
2 wire from the light to the outlet .
Whatever you choose, make sure your boxes have room to accomadate the
wires.