Go to the Brion Toss web site.
Brion Toss Yacht Riggers, Sailboat Rigging
Buy his splicing video, a medium splicing wand, 4" marlingspike, and a small Point Hudson "Phid". Add the small wand to do 1/4" and 5/16". The medium works for 3/8 to 5/8 braid from my experience.
IMHO, One of the best purchases I ever made. find some #4 waxed twine, #10 sailmakers needles, and a riggers Palm. These tools and knowledge will serve you over and over.