If opportunity doesn't knock, build a door. Then always keep the door open, so that opportunity doesn’t have to knock.

Also termed as "planned happenstance" it is your responsibility to "create your own luck" instead of waiting for things to magically fall into your lap (they won't). You have to initiate your own luck by taking positive action to create opportunities for yourself. Remember that the good things in life are earned :)

If you're interested in reading some articles about this topic, I have a few I could recommend :)

Make Your Own Luck

It is quite possible to make your own luck by seeking things that will lead you to happiness, success, and fulfillment. Take the initiative - don't wait for things to just fall into your lap, because you'll end up wasting all of your precious time.