The best approach to service of God as far as I can tell is the straight Litvak approach of learning Torah. Of course if one looks at the statements of the Chazal [sages] about this this is in fact what they say. [As brought in the mishna in Peah and the Yerushalmi there that every word of Torah is worth as much as all the other commandments combined. But also one can see the "image of God" in people that learn Torah for its own sake all day. It is clear there is a world of difference between those that learn Torah as opposed to the phony and plastic religious world.