TestNG - How to run TestNG from command line successfully

Install Java environment and set Java environment.
Download TestNG archive, set TestNG environment and set the CLASSPATH for the testng.jar in the environment variables.
Create a new folder "XTest".
Compile all your test classes and put them (.class files) in the folder "XTest".
Put your "testng.xml" and ".properties" files to "XTest".
Put your test data files to "XTest" (Remember to keep test data directory structure, or the test class will not find test data).
Create a new subfolder "XTest\lib".
Put "testng.jar" and "jcommander.jar" to subfolder "XTest\lib".
Put all your test project dependent .jar files to subfolder "XTest\lib".
Browse to the folder "XTest" via command line and run the command 

java -cp "lib\*;" org.testng.TestNG testng.xml