First let's look at a simple page like this.
What is wrong with a page like this?
As it is a small page it should have a stub template.But before you add Template:Stub, check if the page is about a certian topic that should have a specific stub template.
Once you figure out which stub template to use simply add it to the bottom of the page.
The template will add Category:Stubs and the category specific to the template to the page so that people know what pages are stubs.
(These are some current stub templates, a full list can be found here.)
|Template:Extreme Stub||This is for extremely small stubs.|
|Template:Stub||This is for stubs that don't fall under any specific category.|
|Template:WeaponStub||This is for weapon articles that are stubs.|