While it is not really a genealogy tip, it is a good one anyway.
When doing your research, consider turing "off" the email and some of the other "constantly on" computer applications that demand attention. Consider even getting away from the computer, unless you are searching online sites. Sometimes the constant distraction can negatively impact your concentration. Researching with several other tasks going on in the background can cause us to overlook the obvious. Sometimes multitasking is not as efficient as we think it is.
Some research tasks require concentration, whether it be reading a foreign language or analyzing 1840 census returns. Do your research a favor the next time you are working and give it your full attention. You might surprise yourself at how much you accomplish.