I would start by playing thruogh 1,4,5 patterns using bar chords. In the key of C the 1 4 5 is; C(1) F(4) G(5)

1st play the progression playing the 1 chord off the 6th str.(8th fret) then play the 4 & 5 off the 5th str.(8th & 10th)
now reverse it, play the 1 chord off the 5th str.(3rd fr.)and the 4 & 5 off the 6th str.( 1st & 3rd)

after awhile you will start to be able to recognize these patterns in songs you play. Then start to look at where the other 4 chords fit into the pattern (236&7)