wind knots I lost a nice trout this summer to a wind knot
Also, use the slip on leader loops that have heat shrink coverings to attach your leader to your fly line. It helps greatly and you don't need to use a nail knot.
God grant that I may live to fish until my dying day,
And when it comes to my last cast, I most humbly pray,
When in the Lord's safe landing net I'm peacefully asleep,
That in His mercy I be judged, as big enough to keep.