delay is a common effect - but it must be in time with the track. If you don't know the tempo as it relates to time try this. - get a stop watch with 100's displayed i.e.
0000.00
The start beating the fours - 1, 2 , 3, 4, and start the stop watch on a down beat - now count 11 beats stopping in the eleventh. The stop watch will now read milliseconds like so 0004.50 which is a 450msec delay - other delays at this tempo are 225 and 112.5 etc. If you put the eights delay (225) on the guitar it really livens it up - just a touch!
cheers