Are you stuck on an ancestor and trying to determine which direction to take next? If so, then I have a tool for you. I recently came across a customized genealogy search advice program.
The start page of the program gives you three options-advice for searching for an ancestor and their parents, advice for searching for an ancestor's siblings, and advice for searching for an ancestor's other descendants. The program walks you through asking questions along the way to determine what would the best options for your search.
After you have answered all the questions, you get a page with all the potential places you may find information on your ancestor. Some of the resources are linked directly from the results screen, but keep in mind that not all the resources are free.
If you want to check out this free genealogy resource, give it a try. The search is free and it may point you in a direction you haven't tried yet.