First, I love panda's, so someone called panda replying to my post makes me ridiculously happy!
Anyways, I think I need to send my parents with family group sheets and a notepad and get them to interrogate their parents. I find it easier to research those 1900 and earlier because I don't know them, whereas I'm quite young and fortunate enough to have three of my grandparents still with me (yet I began researching the one that died..!). So while I'm starting with great grandparents, it seems odd starting with grandparents as they're still here, even though they'll have the most information!
I definitely realised the stories are most important with the owners of the company. The secretary (my great great grandfather) died in 1904 aged 31, just 15 days after his son was born. The wait for that certificate was heart wrenching, and the relief that he met his son before he died was overwhelming and gave me extra drive to continue my research.