Modafinil, from my limited experience, corrects my sleep-wake cycle. Also something exciting to look forward to, or a great pressure, like an important meeting

Modafinil, from my limited experience, corrects my sleep-wake cycle. Also something exciting to look forward to, or a great pressure, like an important meeting or appointment. Also, social pressure, e.g. camping in the mountains with friends, the sun wakes me up at 5am eager to start the day. Otherwise I could sleep till noon.