I just read a book called "The Luck Factor". The author seemed to be saying that luck is basically a matter of perception, approach, and maximizing opportunity. In other words, the more you try, the more likely you are to have a positive hit. He also seemed to state, and I might agree, that creating a positive approach to life helps you to notice opportunity, whereas, a negative approach causes you to miss certain things.
The book is interesting in that it discusses some of this but it's poorly researched for the most part and the author really isn't clear on what point he is trying to make. He seemed to waffle which I think is due to the fact that he also gives seminars and is probably hoping to make a few bucks off the book.
I've learned to not believe in luck or hot streaks. Percentages do tricky things and random chance very often produces things which seem like luck. I do, however, think that certain approaches to life are more likely to produce better results than others. Maybe, believing you are lucky is one of those but then you wonder how many lucky people lost their fortunes in Vegas and were never heard from again. That's the problem with luck....you only hear from the lucky ones.