When you locate that obituary or death notice for your ancestor, consider reading the entire thing--the newspaper that is.
Reading an entire issue (or two) of a newspaper may give you some insight into the time in which your ancestor lived. At the very least you might learn about the weather and who knows what real details are waiting for you in those other pages.
You might even get a historical clue that explains something else in your research.
Don't just copy the obituary and head back to your searching. See what other news is waiting for you in the paper.