Probably the most important thing I do is to set aside each day, usually the first thing in the morning when I wake up to spend time in reading the Bible, a devotional, and praying. Here is the link to the website where I get my devotional.
First15 It also has a guided prayer section, and suggested scripture reading.
The most important thing is to make your quiet time, yours... your time to talk to God, reflect on your actions, life, and how you relate to others. I am not going to give you a denominational lecture, what I am going to tell you is the fact that a personal relationship with Jesus is the most important thing. Or at least to me it is, it gives me the strength and knowledge to interact with other believers and fellowship with them. Good luck and feel free to ask any thing. God Bless!
Bruce