Guitar Tricks - Or More Guitar Education
For example, Eddie Van Halen, master of guitar tricks, did some great songs with harmonic tapping of regular chord shapes where he would hold the chord in its normal fretted position such as at the 3rd fret, and tap the harmonics of the chord shape starting at the 15th fret. The point is that knowing the trick itself won't do a whole lot for you in regards to learning your guitar. By knowing your chord and scale shapes as Eddie Van Halen does, then you can add "effects" or guitar tricks to your musical repertoire which includes both the knowledge of music and mastery of the guitar fretboard.
Often times a whammy bar bend is used to go to a specific note, meaning there is a purpose, a knowledge of music theory behind the application more than just a use of guitar tricks. Sometimes players for example will just wail with the whammy bar without a specific note target and that is one way of using guitar tricks without any music theory or fretboard theory. However, many times guitar tricks are used as an adjunct to defined musical composition, and fretboard theory such as arpeggio patterns for example which is why the affect of the guitar tricks is so much better.
Learn your guitar music theory, guitar fretboard theory, and how to apply it in guitar soloing and in chord progressions first, then when you start to get into guitar tricks they will be much more effective in your guitar playing.