I have been praying salat al Layl for about a year now and I just wanted to do work with it. How can I make my salat al Layl better. Any duas that should be recited. Any certain things should be done?

Try to perform it in a dark room, focusing and turning to God Almighty.
The issue is not a question of many supplications in prayer, but rather the important thing is to go to Him, Glory be to Him.