I like to use a fisherman's knot before soldering two wires together. It makes the bond way stronger, and it looks good. The most useless one I know of is that

I like to use a fisherman's knot before soldering two wires together. It makes the bond way stronger, and it looks good. The most useless one I know of is that speedy way some people tie their shoes with one quick movement. It looks impressive, but that knot can't really hold, so it comes undone really easily.