If possible, one should awaken at midnight and say Tikun Chatzot; lamenting the destruction of the Beit Hamikdash and the resultant loss of  Torah learning as well as the numerous Mitzvot we can no longer do.

If getting up at midnight is not an option, one should get up before dawn to say Tikun Chatzot.

After Tikun Chatzot one should learn some Torah;  Mishna or Tehillim or Mussar.

At the very latest one needs to awaken in time to get to shul before they start morning prayers.

Source: Kitzur Shulchan Aruch 1:5

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