rear end is a easy thing to do. jack the car up make sure its safe, (ie axle stands) wheels off and disconect the handbrake cables.
on lhe swing arm plate there is for holding bolts undo take plate off and this is the carefull part.
edge out the trailing arm(it will spring down so make sure your arms and legs are far enough away) when it springs down you can then carefully pull the arm out but not too far as you'll only want to move it up one or two splines at a time,usually best to mark where you took it out of, just incase!
in the case of the front ones as far as i'm aware new adjustable shocks are the best route, once you have done it make sure you re do the tracking, a comon mistake and cost you dearly!
hope this helps