The easiest way that I have found is to get a kit that allows you to power the drive from a separate wall socket and connect a data cable from the drive to a USB socket on the computer. Such a kit usually consists of four components:
A mains lead - wall socket to black box transformer
The black box transformer - has outlet 4 pin molar for IDE drives
A USB cable ending in unit for connecting to an IDE drive or SATA cable
A SATA cable for connecting to the SATA drive (your Barracuda 1Tb in this case)
The components can be seen on this Ebay site:-
USB 2 0 TO SATA IDE Cable for HDD with Power Converter Adapter UK
The one thing missing from this set up is a power conversion cable converting the molar 4 pin power connector to a SATA power connector. These can be a molar plug to go into the lead from the black box and either a single SATA power plug, or a double SATA power connector as shown here :
Molex to 2x SATA Power Dual Power Adaptor Splitter Cable Lead Hdd Cd DVD...
This option is inexpensive and offers great flexibility in the type of drives that can be connected to a USB port, 2.5 or 3.5 inch, SATA or IDE.
In your particular case you may be able to get a dock that connects to a power supply and a USB port, with an opening in the top to take a SATA drive. These tend to be more expensive and only suitable for SATA drives not IDE.
Hope this is helpful, if so would you please register that with Fixya