Watch the The Edge online guitar lesson by Jeff McErlain from Kings of Tone
Take your time when working with new effects especially delays. It's important to get the right blend of effected signal to dry signal. In other words, how much delay or how little delay. When playing live I suggest you mark your setting for each song if they are effect heavy. There is nothing more distracting than a guy messing with his pedals all night, especially in the middle of a song. A little piece of paper with the setting next to your board is all you need.