To know how to write a strong logline, you first need to know what it is! A logline is an extremely brief—usually a single sentence—summary of the script’s plot that includes the story’s central conflict1.
Here’s the thing, though. It’s just as important to know what a logline isn’t, as it’s not the only scripting tool used for screenwriting and marketing purposes.
How do you write an amazing logline?
I definitely look at precedents. There are a lot of good sample loglines available online. Since I mainly write comedies, I usually try to convey the basic premise as succinctly as possible while still getting across that it’s going to be funny. It’s always helpful when the basic premise itself is funny.
I actually like writing at least a draft logline before I commit to writing a script because it’s a good test of how marketable the concept is. If writing the logline is really difficult, it tells me that it will likely be a harder sell, given what studios/Producers tend to look for.
Also, I read my draft loglines out loud to confirm they’re simple enough and would be easy for an Agent/Producer/Exec to pitch over the phone.