Wondering how to live your life? Like so!

दृष्टिपूतं न्यसेत्पादं पस्त्रपूतं जलं पिबेत् ।
सत्यपूतां वदेद्वाचं मनःपूतं समाचरेत् ॥

- मनुस्मृति

One must set foot only after seeing (cleared after an inspection by the eye).
One must drink water only after passing through a cloth.
One must utter words that pass through the truth filter.
One's actions must pass the conscience test.

- Manu Smriti

Truth filter.  Conscience test.  If only!

Or, how about the following one?

प्रथमे नार्जिता विद्या द्वितीये नार्जितं धनम् ।
तृतीये नार्जितं पुण्यं चतुर्थे किं करिष्यसि ॥

- सुभाषितरत्नभाण्डागार

If you did not:
    Study in your early life,
    Earn wealth in your youth,
    Do noble deeds during old age –
then how are you going to face death honorably?

- Subhashitaratnabhandagara

Of course, I select only the secular ones, and leave out the religious from this wonderful collection. (I have reformatted the translations.)