Need help with Moving objects

Hi im a beginner to Unity3d and i need help with moving object when pressed a button. just take a look at my codings.

//Moving Object Forward
if (Input.GetAxis("Up")) {
transform.Translate(Vector3.forward, Space.Self);
}
}

//Rotating Object Leftwards
if (Input.GetAxis("Left")) {
transform.Rotate(Vector3(30 * Time.deltaTime, 0, 0), Space.Self);
}
}

The movement forward is fine. but after i rotate, the movement is not forward and the player is moving to the standard axis, not the axis of the player. Help needed. I'm a beginner so please help me! And why isn't the Space.Self working?

 

Use this Code:

Code (csharp):

1.  
2. // Rotate around y - axis
3.     transform.Rotate(0, Input.GetAxis ("Horizontal") * rotateSpeed, 0);
4.    
5.     // Move forward / backward
6.     var forward : Vector3 = transform.TransformDirection(Vector3.forward);   [B] //You Missed this Line[/B]
7.     var curSpeed : float = speed * Input.GetAxis ("Vertical");
8.     transform.Translate(forward * curSpeed);
9.