Create a custom list in SharePoint by following these steps:

1. Log in to SharePoint with your user credentials.
2. Choose a list template from the list options.
3. Choose the most suitable template and click on Create.
4. Input the necessary information such as List name, Description, and Item Limit.
5. Add columns and fields with specific type to store the data.
6. Customize list settings as needed by choosing settings in the List Tools menu.
7. Under the list item Common Tasks menu, click on New Item to start adding data.
8. Now that the list is created and data is added, it can be used for various tasks.