Lady luck is just a thought and it's more in players minds than anything else. Yet, most players like to follow a ritual before playing - superstitions, if you will. There are some who like to kiss their cards before playing their hand, or blow on dice, while others simply like to knock on wood before placing their bets.
It seems funny how all people sitting on a table appeal to Lady Luck for a win, even though it is well known to all of them that there have to be some losers in any casino game. In a way, lady luck is more of a mixture of karma, playing skills and good (or bad, for some) luck.
Generally, in a casino, you'll hear terms for those who go on to do well and make money such as "lady luck smiling", "lady luck shining" and "lady luck winning". On the other hand for those who don't win and seem not so lucky, the terms used are "lady luck is angry" and "lady luck is failing".
One effective way of making sure that the lady luck smiles on you more often than not is to play online casino because the odds of winning in an online casino game are far better than the real one.