My first “hint” would be practice, practice, practice! G I
guess you want something more substantial than that, right? One
thing I do is make sure all my tubing is cut to exactly the same
length and then I make 8 to 10 beads at one sitting. I do my
best to make sure they are all the same size, shape and
color/pattern. With that many finished beads to choose from,
and I can almost always pair them all up. At most, I end up
with two that don’t match well.
If you are making a white or clear bead, and laying the color on
top, be sure to pay close attention to how big the bead is before
you add the color. There is a tendancy to end up making the base
of the second bead as big as the finished first bead. Remember
that when you add the color you will be adding more mass to the
bead. You have to allow for that.
Honestly though, your ability to size and shape your beads the
way you want WILL improve with practice. It’s something you just
get a feel for after a while.