Sh Ibn Baaz rahimahullah was asked what a person can do to get up and be consistent for Fajr.
He mentioned the following four points:
1. Sleep early
2. Set an alarm for the appropriate time for the salaah.
3. Strive in asking Allah for aid and success.
4. Recite the legislated duas and dhikr before sleeping.
With these pointers Insha Allah, you will be granted success to wake up for the prayer and catch the congregation. [Reference: Majmu Fatawa 8/276]