If you have standard suspension, you should be able to lean on the car and there should be some play in the suspension. Push down, it should raise up to the original position but not bounce about.
Is the car sat straight and flat, not leaning in any corner or one side.
Have a look under your arches, see if there is anything that is rusted, crumbling, is there something on one side isn't on another etc.
another way is to drive the car, depends on how bad you think a problem is?
If the car handles badly, Very hard, very soft etc.
I had it with my other car the front offside didn't have any kind of damping just "banged about" Replaced the strut and perfect no problems.
