Agreed. Waiting is just sitting still. Opportunities are most times created; not just come by luck. And they most often aren't perfect and require you to take a bit of a shot in the dark.

Sometimes the opportunity comes, but you aren't capable of taking it. It's more of hard work and strategy then just wait for luck to smile at you.

You'll be waiting for the 'perfect' opportunity, you'll end up missing others that could've been what you needed. There's no much rule of thumb o this, it's only perseverance and presence of mind.