I get this question a lot!!!
How do I reuse my Test Suites?
In MTM we have a very easy way of reusing Test Suites, just follow these steps:
Here I have created a source plan with Test Suite to copy, the Test Suite contains Requirements and Test Cases.

Step 1: Create a new Test Plan

Step 2: From the Plan tab click the small arrow button that will launch the “Copy Test Suites From Another Test Plan” window

Step 3: Choose the Test Plan from the dropdown list
Step 4: Choose the Test Suite to copy

Step 5: Click the “Copy suite into plan” button

That is all you need to do, you can now see the Test Suite copied to your new Test Plan

Have Fun!!!