It sounds like you had a False Awakening (FA) this morning. This is a sign that you are very close to a lucid dream. It shows that you were more conscious and focused on dreaming. You also had a brief lucid dream the other night when you woke up prematurely. It sounds like you are very close. Keep up what you are doing, and I'm sure you will have a lucid dream soon. It takes a little time because you are building new habits.
Try to do a lot of reality checks right before you go to sleep, and tell yourself, "The next thing I see, will be a dream. The next time I'm conscious, I will be dreaming."
I bet, once you get a good lucid dream, you will be so excited you will be itching to do as many WBTBs as you can.
If you want a technique that does not interfere with your sleep schedule, try a dream re-entry technique like this one:
http://www.dreamviews.com/community/...ead.php?t=6124