One of the most frequent questions I am asked is 'What knot do you use to join braid to mono?' When dealing with micro lures any hindrance in terminal tackle will affect its ability to 'swim' correctly so I use a very tidy and strong knot called the Reverse Albright.
Form a six inch loop in your braid using the improved clinch. Run the mono and the braid loop side by side, then wind the braid loop around the mono at least 12 times - pass the tag end of the mono back through the braid loop - pull both ends of the mono slowly whilst holding the braid firm (usually wrapped around a pen or something similar) then ease the knot down.