I would start by inspecting all bushings and ball links and also the top of the struts. The drop links can also rattle if they are worn.
Once you have dealt with the most common failure points you have to start checking everything else. The good news is that it is a lot easier to identify a failing component.
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2004 Boxster S Silver - FUNTOY
2002 Boxster Base Guardsy Red - FUNBOX
1987 Caterham Super 7 1700 Supersprint
2009 Mercedes Benz CLK 350 convertible
1941 Dodge Luxury Liner Coupe
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