Librarians often compose extremely useful annotated bibliographies on topics, states, or even time periods. Those of Gates, Jessica Brown and Francis Prucha are examples. In all research, librarians and those trained in library research techniques are your best friends. Don't be afraid to ask for help. Reading book reviews is an excellent way to become familiar quickly with the work of others.
Every history journal has a book review section.
The major history journals are places where new books are reviewed each year, usually within 18 months after publication. Reviews in American History offers a more extended discussion, often treating several books on the same topic. Check The New York Review of Books for extended, timely, and lively discussions of the literature by well-known writers. As you read the reviews, be conscious of how the reviewers treat the work of others and look for examples of good critical reviews that you would like to emulate. Subscriber networks on the Internet and professional meetings provide other opportunities to learn about the work of others.