Friends around me always lament to me about their "bad luck". I just wonder why are there so much "bad luck" around but hardly any good luck. Maybe people remembers "bad" more than "good".
I think I had a fair share of bad luck all my life, like, missing out on the winning lottery number by a whisker, raining out there when I don't have umbrella, car being scratched and so on... Marie Callas said there is a block between you and luck, that's why there is a bad luck. To change it, there are two ways. One is to take steps to do those things that lead to more good luck. The other is to stop doing the things that cause bad luck. Logical right?
I'd like to point out bad luck is often caused by your own actions. You receive what you have done. Maybe you have been blaming people around when things go wrong, or giving excuses, who and who is at fault, all except yourself. Blaming others or making excuses puts things outside of your control and so things tend to "happen" to you even more, often in the way of bad luck. Stop giving excuses and increase area of influence in the project you do will give you more chances of receiving good luck!
I remember vividly gurus often say we have to learn from your mistakes, for that's the best lessons of a person's life. Identify what go wrong for you and learn from it, or even earn from other's mistakes and you can avoid making many of your own.
I should end by saying, luck is the result of what you have from your sphere of influence. The more positive contacts you have the more luck you will receive.