I'm reading the Bhagavad Gita.

As far as I understand, in chapter 3, the importance of right action / good work is highlighted.

Krishna says something along the lines of, whatever great people do, others will follow them, so, one ought to work in order to set a good example to others:

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> 3.22 For me, Arjuna, there is nothing in all the three worlds which ought to be done, nor is there anything unacquired that ought to be acquired. Yet I go on working. 
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(this translation and the next by Swami Adidevananda)

Krishna explains to Arjuna what action *he* should be taking earlier in the text; that's clear. 

What I'm wondering about is how a person studying the text should tell what the right work for them is. 

This verse especially troubles me, because it suggests that the right work is not necessarily the thing one happens to be good at:

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> 3.35 Better is one's own duty, though ill-done, than the duty of another well-performed. Better is death in one's own duty; the duty of another is fraught with fear.
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Moreover, action should be taken without attachment to the fruits of action (discussed in chapter 2 also, but for the sake of keeping things contained):

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> 3.19 Therefore do thy duty perfectly, without care for the results, for he who does his duty disinterestedly attains the Supreme. 
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(translation by Sri Purohit Swami)

So considering which work is likely to have the best direct results seems unhelpful too.

So, how do I know what work is right for me?