Guide Tom Rowland describes Lefty Kreh's 50% rule to tie a leader for flyfishing. In this particular video (below) Tom is targeting sub-surface Bonefish (hence the fluorocarbon throughout), but this also works for trout, bass, carp, etc. Just match the LBs to the species. The key take-away here is the 50% rule people!
|1||50LB Fluoro||4′||Tippet & Line|
|1||30LB Fluoro||2′||Tippet & Line|
|1||25LB Fluoro||1′||Tippet & Line|
|1||15LB Fluoro||2′||Tippet & Line|
||1||Improved Clinch Knot||Knots|
||1||Flats||Flies & Beads|