Later tonight, the earth is going to be hit by a bunch of garbage.
Technically, the shower has been going on all month as the Earth moves through a cloud of debris left behind by the Swift-Tuttle comet. But it will reach its peak intensity Thursday morning at about 2 a.m. EDT. In addition, the moon is just a thin crescent tonight and will set early in the evening, which means less competition for light and a better chance to see the meteors.
Light is the main thing to worry about interfering with enjoyment of the meteor shower. If you live in a city or a large town, hit the road and drive away from civilization for a spell. When the sky has even more tiny white dots in it than usual, you've hit a good spot.
The other thing that can keep you from seeing the meteors is clouds. Sorry, no getting around clouds.
If you are stymied by clouds or bright lights, just remember what I wrote earlier: Meteors are literally someone else's burning garbage falling from the sky.
But if the skies are clear, enjoy a lovely evening of stellar enchantment.