Okay, well I'm sure you all want to sound and play like the great master himself, Jimi Hendrix. While there is no guaranteed way (since Jimi is impossible to duplicate) I can get you pretty close.
Jimi Hendrix took the electric guitar to new heights and did things no one before him did. Being an experimenter, instead of having a left handed guitar, he took a right handed guitar and restringed it so that the low e string was now the longest string. This would give him a very unique tone. Right handed players can get that tone either by restringing a lefty or getting the Voodoo Stratocaster.
And also, get an 100-watt Marshall amplifier, Jimi often tinkered with his settings, but if you have enough distortion and angle your pickups towards the amp, it should create hendrix-like feedback.
Jimi's most famous effect is the wah, and you should get a Clyde Mccoy Vox wah (which Jimi used) or a Dunlop Hendrix pedal, both work fairly well and if you run it through fuzz/octavia you can get feedback at certain settings, giving you a star spangled banner like sound.
His second most used effect is the Dallas Arbiter Fuzz face, which is the basis for songs like foxy lady or purple haze. He also uses a Roger mayer Octavia which makes his notes sound one octave higher and a Univibe, which emulates the leslie rotating speaker. Both of these can be seen in his rendition of the star spangled banner as well as "Machine Gun".
Alternatively, you could also go for the Digitech Jimi Hendrix Pedal, which gives you all the effects of the above and then some. While not as good as using the effects seperately, it does a good job of emulating hendrix. The effects include "Purple Haze" "Foxey Lady" "All Along The Watchtower" "Wind Cries Mary" "Star Spangled Banner" "Voodoo Child" and "Little Wing".
Playing Like Jimi
While it is hard to duplicate Jimi's playing, he often utilizes arpeggios, barre chords, inverse chords and double stops in his improvisation. The song Little Wing is a great example of this. It also shows how Hendrix thumbs his bass notes as a melody while using the rest of his fingers for rhythm.
He also tends to fly all over the place...as in Voodoo Child He makes transitions from the 15th fret back down to the 2nd so keep practicin making those position changes.
He also has many sound tricks, for example sliding the thumb along the low e string back and forth creates an almost 'humping sound' (Hendrix is notorious for making sexual innuendos with his guitar), and he'll also use the back of his hand to slide along the guitar (you can see this at monterey). Since his controls were right beneath his hand, he was often very accomplished at volume swells (turning the volume knob up and down, as seen in Foxey Lady). And a technique called pickup sweeping where he switches his pickup selector switch back and forth to create a variation in sound (turn the middle pickup tone to 0 for greater effect). Also his heavy usage of the whammy bar is notorious so just fool around with that once in a while.
Lastly, for those of you who like to show off, playing behind the head, legs, back, etc. is not really that hard, just practice those tricks.
Keep practicing swinging your guitar behind your head, between your legs (keep your balance) and behind your back and you will gradually get used to it. Playing with your teeth also requires practice, but its easier to use just the bottom teeth and pick the D,G and B strings as the rest are relatively hard to pick. Gradually you will find yourself doing sumersaults over the stage, sliding along the front of the guitar with your arm, and lighting your guitar on fire just like Jimi did at monterey.
Thats all I can offer for now, Jimi Hendrix was primarily a blues and psychadelic rock player. I suggest playing Purple Haze to start off with and then move to advanced songs such as All along the watchtower or Bold As Love (try playing that while singing).
I just practice Woodstock improvision everyday and playing like Hendrix comes second nature to me. Everyone should appreciate and learn from Hendrix.