Step 1: Parts and tools
Helping hands also are useful - jacks are tiny and need clamping.
Step 2: Understanding the Jack
Step 3: Stripping the Wire and insulation
The trick to getting a perfectly stripped cable is to score around the cable's insulation with the box cutter, then use a cable stripper (I really prefer the pulling type. Obviously, if your cable is too long EXPERIMENT with various methods.). If the cable has light insulation a light scrape with a knife should remove it