How do I create a new project task?

Open the module Assets Tasks
Click on New task...
Describe the task in the Task name and in the tab Task description
Eventually, link the task to a project type
Click on Save & close
A task can be linked to a project type. When a project is created with that type, all tasks linked to that type will be linked to the newly created project.
Project types can be created and modified in Administration > Projects. The default project types are Standard, Intermediate and Special.