If your high school or travel team has at least two coaches, you can use what Bates calls a two-fungo drill. One coach can hit to third and second, while the other hits to short and first. If catchers are finished working with the pitchers, they can feed balls to the fungo hitters. The idea is for the third baseman to practice turning a 5-4-3, with the first baseman moving up toward second base about 60 feet instead of 90, with a net behind him to catch overthrows. The shortstop works on throwing across on 6-3s.
This is the drill we ran all through high school. It is the most time effective and skill intensive way to warm up a team, but your boys must be able to play catch! Fungo-ers stand in the "fungoe circles" that any good field has (and if it doesn't, you know where they're supposed to be - just outside of the home-plate dirt circle, towards the dugouts). The catch to this method is this - you have two first basemen, allowing both sides of the infield to throw across. Herein lies the only danger - one of the firstbasemen has a lengthy throw back to a shagger, so caution must be excersized (a catcher with a good head on his shoulders really helps).
Players can also create complex holes such as ‘two-part holes’ where the players must hit or reach one object before attempting to shoot at the hole. For example, a ‘two-part hole’ could consist of hitting the scoreboard first, and then once they have hit the scoreboard they must hit the ball back to home plate, that would be one hole with the player with the fewest strokes winning the hole. ‘Two-part holes’ are typically saved for the last hole in order to make things more complex and difficult on the leader.