Some of the major points of Rav Nahman are the Tikun Chazot, Hitbodadut, Seder HaLimud, Not to be stubborn about anything, to be joyful always. Tikun haKlali.

(1) The Tikun Chazot thing he saw as the main job of every Israeli. That is the midnight prayer for the rebuilding of the Temple. [That does not have to include the "piyutim" [added songs]. It just is a short Tikun Rachel and a somewhat longer Tikun Leah. []I actually have not been able to fulfill this for  long time but I still see the hours after midnight as a very important time to learn and pray.

(2) Hitbodadut is thought to be his major point. It is talking with God as one talks with your parents or a close friend in your own language. This was so important to him that he would spend whole days on this and he said that if one really wants to serve God properly he ought to spend the whole day on this every day. [I actually did try to do that fr  awhile when I first got to Safed in the forests surrounding that city.]

[3] Seder HaLimud is also fairly well known but not as much as the Hitbodadut idea. It is to learn by saying the words and going on. It is how he advice one disciple Rav Nathan to go through the entire Shulchan Aruch with all the commentaries [Shach, Taz, Magen Avraham, etc.] in one year. As I have mentioned before I found this very helpful for me when I majored in Physics at the Polytechnic Institute of NYU. [And in  fact that is how I think Physics ought to be learnt. You do not have to be  a genius to learn Physics. If a block of wood would learn in this way, it would also become a physicist in time.] 

[4] To not be stubborn about anything is something that I have also found helpful. Not to force any issues. When the waves of life come along, to lower my head and let the wave pass over me.

[5] To be joyful Rav Nahman saw as the very essence of Torah. Joy he said is the very essence of holiness.

[6] Tikun haKlali. To say ten psalms the day one has sinned any kind of sexual sin. [16, 32, 41, 42, 59, 77, 90,105, 137, 150.]