I am sooo spoiled. I started doing the nail knot with the tool Frank supports.
But my favorite is this one that is nippers, hook sharpener, eye cleaner and Nail Knot tool
Furle leaders are taking MONO or I prefer Thread. A long board with two rows of peg, but the last one in the middle to be shared by both sides.
Depending on how much of a taper you want is done by the amount of pegs put on both sides of the board. The pegs on left and right side are staggered except the first peg, which will be even and your starting and ending point. I use three pegs on each side (including the start and end peg) then the one in the middle.
You make a loop in the Thread or Mono, put it over first/start peg (either side), go down the board on the same side and loop around second peg, back to start. Keep doing this for however thick you want the but section (I use seven, odd number cause you are going to continue down the board on the last loop to the next #3 peg) Once you get to the 3rd peg, loop and go back to the second, but you have to go between the loops on the second to join them (on this I do 5 loops) on the last time around, go down to the last "center peg" but go around the outside and up the other side to peg 3 on the oppositer side. loop and go back around the center peg to the 3rd on the starting side, go between that loop and go back around center again this time up to #2 on the opposite side. Repeat in reverse.
You end up with a "U" shape starting with 7+7=14 / 5+5=10 / 3+3=6. If you stagger the pegs, you have now got a 14-12-10-8-6 taper. Put a clap on the center peg and twist both sides one at a time, same direction from the start and end peg. Twist till they have shrunk a couple of inched. Put a weight where the line forms a pont (a paper clip works good here with a 3lb sinker)
Grab both the start and finish ends, join them together but leave a small loop for the SHORB finish loop. Carefully lift and keep tension or it will pig tail
hang and let it spin away. Remove weight and let it continue to spin.
Hard to describe but Kathy Scott has a DVD out that is fantastic and takes you step by step. I think it cost like $15.
They are the best and last a long time. A little gink, aqual, or muicilin to float and Xink to sink.