Have you visited Babylonia? Maybe you are even a regular? Do you want to help Babylonia become even nicer? Then why not contribute some work?

In the Tasklist, you can see tasks already created. A task can stand on itself, but can also have subtasks under it. If you want to help Babylonia further, you might check tasks that have not been assigned to anyone yet. This means no-one is executing these tasks at the time. If you want to offer your help, just leave a comment in the task, and it will be assigned to you soon.
If you want to help, but there's no task already there that suits your skills, you can submit a new task. This can be done by clicking the "Add Task" entry in the menu. Fill in the fields with some detail about what you want to do and how. The status of your task will be awaiting approval: someone has to review this task, to see if it fits in the "general plan" of babylonia. Once the task is approved, you will be noticed...
When you already have (one or more) tasks assigned, you are free to create subtasks within these task. Therefore, create a new task (add task), and choose "subtask of an approved task" as the status.

 So, in short, the best ways to help babylonia:

1. Browse the tasklist, see if you can help with any existing task
2.  Add a new task (awaiting approval), and wait till it gets approved