Martinito

This is my first time posting, but I had a Lucid Dream only one time and what i remember was nothing short of weird.
I was reading a Stephen King book before i went to sleep, and it was getting pretty gruesome. I decide its late and begin to fall asleep. Now i remember my dreams often as I have kept a dream journal. Yet just as i was starting to dream I realized i was dreaming. This made me open up my eyes and what i saw threw me off. I saw the room i was staying but it looked different, and as i was looking around I kept thinking "WOW i did it im Lucid". Yet as i looked about the room I saw the room as if my eyes were made of glass and had cracks through them with no point of origin. I then got excited and stayed in my bed and was trying to think about something to do. My mind immediately went to the gruesome death i just read about. "No! i thought and tried to think of the next thing, which was Zombies at the time. Before i could think of something else I felt this groggy sound behind me and then i hear almost breathing but choking. I knew I could feel a zombie right behind me just waiting for me to turn around. So instead of turning around i closed my eyes even harder and desperately tried to think of this girl i really liked.
Then i woke up completely and turned around to see no zombie, i believe i scared myself awake.
Ever since this has happened i haven't been able to LD again, but i do have vived dreams and i'm starting to do reality checks all the time.
Was wondering if anyone had any helpful tips to become Lucid again and what i should do for a real awesome experience.