Research Like a Pro is a great book on how to take your research to the next level. The only way to make progress is to be organized with a clear objective. Diana Elder and Nicole Dyer show you how.

Research Like a Pro with DNA is a great addition to the Research Like a Pro book, but for DNA. This book breaks down genetic research steps in an easy to follow path. Diana Elder and Nicole Dyer along with Robin Wirthlin show you how.

Guide to DNA Testing and Genetic Genealogy by Blaine T. Bettinger is an essential guide for anyone that wants to use DNA in genealogy. Bettinger breaks down a pretty complex topic and makes it accessible.

If you are stuck in your research, The Family Tree Problem Solver has many suggestions on what to try next. I found the section on land records extremely useful.