The analogy I like best is "Work to increase your surface area for luck." When dissolving a substance, if you pulverize it, you increase the surface area, which allows for greater interaction with the surrounding water molecules, and thus enables a faster dissolving rate.

In the same way, the more interactions one has, the more opportunities for fortune to strike. The result may look like "luck" from the outside, but in reality it was a confluence of both stochastic elements and fortuitous prior decision making.