Need help to assemble my dc motor to my arduino w/ relay switch

Using Arduino Motors, Mechanics, Power and CNC
1

http://www.arduino.cc/playground/Main/DCMotorControl

it says go to forums, but I couldnt find a thread based on this topic. If anyone knows how to properly connect everything, please help. I am a visual learner

2

http://www.thebox.myzen.co.uk/Workshop/Motors_1.html

3

My speed controlling potentiometer is having problems. Is there any other way to control speed? any ideas?

4

My speed controlling potentiometer is having problems.

What problems? Connected to what? How? Is there an Arduino involved?

Is there any other way to control speed?

Yes.

any ideas?

Post some actual information. A schematic. Your code.