Watch your planes in fFy Casting 

Great tip. It is so important but so hard to achieve! The most challenging is to follow vertical plane when we have the rod in an angle of eg. 20°. Especially when we do not watch our back cast.

thank you these are great, the loopy casts might be helpful for heavy flies =D but yes in most cases its bad

This answered a very important question for me: why is my cast curving? Thank you sir