As the saying goes, keep plenty of irons in the fire.  The more you've reached out, the more chance for opportunity.

On the flip side, you could instead concentrate on keeping the right irons in the fire, and not worrying about the irons that have little chance of generating opportunity.

How do you know which irons are the right ones and which are the wrong ones?  Does it help to throw'em all in at once and figure out which work the best over time?