Updated: Dec 15, 2022
The secret to picking a piece for an interp is that there isn't one. Often, it just takes time. But there are a few good places to start.
Picking an Event
One of the best ways to pick a piece is to have set parameters in mind. To give a drastic example, if you are doing a duo, it opens it up to having two people instead of one. In this case, it's a good idea to create a piece with a good dynamic between two people with strong dialogue, which would be less effective with a solo piece.
Meanwhile, picking dramatic interp over humorous helps to narrow down the breadth of pieces out there.
Picking a Topic
So you've picked an event. Next, consider some topics that appeal to you. Some people like to do a piece that connects to them personally, such as a piece about someone from your identity.
If you're doing a POI or TI, find several pieces surrounding one subject matter. It might be a good idea to pick different types of pieces, such as a book, news article, and poem. Songs are helpful for tying POIs together.
Figuring out Characters
Now that you have a couple ideas in mind, think about your own acting abilities. Are you very dramatic, or more toned back? Do you have a theater background?
Some pieces require you to play multiple characters. It's very important to make these distinct. If you have trouble switching personalities, consider scripts with fewer characters.
Elaborate blocking might also be a consideration. How do you think you would pretend to fly, swim, etc? If you have trouble with elaborate movements or staging, try a piece that isn't reliant on such.
In the end, it's up to your own discretion, and remember to have fun!