Alright, let's get started by setting up two tables in Airtable. The first one will be our "Master" table, and the second will be the "Detail" table.

1. Hit that "+" button at the bottom of your screen to add a new table.
2. Name the first table something like "Projects".
3. Add the fields or columns you need in the "Projects" table, like Project Name and Due Date.
4. Do the same for the second table, maybe call it "Tasks".
5. Add fields in the "Tasks" table, such as Task Name and Status.

Now, let's link these two tables together:

1. In the "Detail" table (Tasks), click the “+” button on the right side of the last column.
2. From the dropdown menu, select "Link to another record".
3. Choose the "Master" table (Projects) from the list.
4. Give this new field a meaningful name, like "Project".

Next, let's tweak that linked record field a bit:

1. Click on the field header and select "Customize field type".
2. Make sure the "Allow linking to multiple records" option is set the way you need it. Usually, for master-detail relationships, you'll want this option off, so each task links to just one project.
3. Hit “Save”.

If you want more context in the "Detail" table, you can add lookup fields:

1. Click the “+” button to add a new field in the "Tasks" table.
2. Choose "Lookup" from the field type menu.
3. Select the linked "Project" field.
4. Pick the specific field from the "Projects" table, like Project Name, to display in the "Tasks" table.
5. Click “Save”.

Time to fill in some data:

1. Start entering data in the "Master" table (Projects).
2. Switch over to the "Detail" table (Tasks) and start adding tasks.
3. Use the linked record field to connect each task with a project. Just click on the "Project" field in the "Tasks" table and select the right project from the list.

For a smoother workflow:

1. Create new views in both the "Projects" and "Tasks" tables to filter, sort, or group records as needed.
2. Use the "Grouped by" view in the "Tasks" table to group tasks by their associated project.
3. Customize these views to fit your needs for better readability and organization.

By following these steps, you can set up a master-detail relationship in Airtable, making your data management more structured and your relational database experience a whole lot better.