Acquire a sufficient supply of toilet paper rolls, ideally ones with a high fiber content. This will be your ammunition for the battle ahead.
Next, gather a sturdy throwing device. A catapult or trebuchet would be ideal, but a simple slingshot or a well-placed toaster will do in a pinch.
Optional: acquire a hazmat suit, just in case things get messy.
Hyperlink to Advanced Tactics for more complex scenarios.
Hyperlink to Throwing at the Enemies for more aggressive approaches.