What kind of soil should i use to fill my new raised garden planter?

Question by zenmud: What kind of soil should i use to fill my new raised garden planter?
i just got a raised planter….3×5 and 22in tall. I plan on growing herbs in it (maybe a vegetable, too). What kind of soil/mix of soil should i use to fill it.

a cheaper version seems to be 3 cubic foot bags of garden soil by Kellogg…any opinions?

should I mix in compost..how much?
should i add any sand?
worms?

anything else?

I am new to this and want to do it right.
Thanks for your help.

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