Palomar Knot
This knot is one of the easiest to tie and retains 95 percent of line strength. It is regarded by the International Game Fish Association consistently as the strongest knot known.

Double the line over to make a loop. Then feed the loop through the eyelet of the hook.
Hold the standing line and form an overhand knot as shown. Avoid twisting the lines and don't tighten knot.
Pass the hook through the end of the loop.
Then pull on the hook, the standing line, and the tag end of the line to tighten the knot. Snug down tightly around the eyelet. Trim tag end.