When you’re on the water, you need a knot to attach a fly, a knot to connect tippet material, and a knot to put a loop in your leader. That’s all you need. Practice these knots at home and you’ll have more fun and less frustration when you get out on the water.

(And, OK, if you like a loop knot to attach streamers and nymphs, you might also want to learn the Non-Slip Mono Loop, which you can find here: https://howtoflyfish.orvis.com/fly-fishing-knots/non-slip-mono-loop).

Also look at:
https://flyfishing-blog.com/flyfishing-blog.com/2022/04/20/orvis-tips-for-safe-wading/
https://flyfishing-blog.com/flyfishing-blog.com/2022/03/15/orvis-tackle-tune-up-2022/
https://flyfishing-blog.com/flyfishing-blog.com/2021/12/23/orvis-how-to-attach-a-tippet-with-tom-rosenbauer/