Here's a suggestion on how to become more aware:
Act like Sherlock Holmes.
I'm completely serious. If you've ever read any of the stories, he notices like everything. Just try to look for 'clues' as if you were solving a mystery, and you will become more aware. Notice things about people: What kind of clothes they are wearing, how they tied their shoes, any stains anywhere that might suggest what they ate or previous activities. Look for nuances like this in everything and you will increase your lucidity in more ways than one