If you are looking for a knot for tying your hooklength to the end of your fishing mainline, the figure of eight knot is the one for you...
It's a really easy knot to tie and when tied correctly and used correctly, will provide a small loop that can be used to lock on another loop in another length of line - for example, your hooklength or ready-tied hooklengths.
The best thing about using this knot and method to attach two lengths of line together is that if you push the knots together after the loops have been joined together, you can actually thread the hooklength out from the mainline loop making it really quick and easy to switch to either a thinner or a thicker hooklength in seconds.
Here's how to tie the figure of eight knot.
STEP 1: Fold your mainline into a loop.
STEP 2: Fold it back across itself.
STEP 3: Wrap the loop around the back of the folded lines and thread it back through the main loop.
STEP 4: Adjust the knot size, wet the line and tease it together, pulling on the loop, the mainline and the tag end at the same time.