|I looked and didn't see this tip listed so I hope I don't duplicate.
When you reach the end of the fabric just continue to run out the thread behind the machine and cut it, but not too short.
There is a double eye needle that in my opinion is a must have if you use a serger.
Run one end of the needle back under the outside threads that make the seam, thread the loose end into the other end of the needle eye and pull the thread back under. Works great!