Pray Salat-ul-Maghrib & Isha with one Azan/Iqamah.
Then Collect 70 pebbles + few extra
(Spend night with Talbiya, Zikr, Tahajjud, Dua and sleep as well it is sunnah)
Pray Fajr Salat
Make Dua a bit before sunrise while standing (sunnah)
Proceed back to Mina tent.

Few Recommendations:
Remember location of group and belongings.
People easily lost because there are no tents in Muzdalifa but wudu and toilets facilities are available..
Stay with your group, follow instructions of your group leader.
Sleep as well because the upcoming day of 10th Dhul Hijjah has very busy schedule.