There are many tools that can help you to strip wires. You can buy them at your local hardware store or Internet markets like eBay. Then place your tool about 1 cm from the end of the wire and remove the cover; depending on the wire, you may be able to gently cut your wire with scissors and remove it with your hands:

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After stripping, your wire will be ready for soldering:

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At this point don't forget to place a heat shrink over the wire because once you connect the wire with the connector, you will not be able to do that.

Be careful when soldering anything. Almost any soldering station has enough heat to injure your skin. So anything that you are trying to solder, do it with caution and with a clear table. Place your wire in the paste, as shown:

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