How can I make my ride smoother?

I have a 95 Civic hatch and it's been lowered by some kind of aftermarket suspension. I don't know a lot about coilovers or struts but they look like they can be screwed up or down. In any case, the ride is bumpy as hell. I feel every little crack or pebble I run over.
I want a smoother ride in my car. What should I do?

Already answered. Please don't make duplicate posts.