Almanac of the Federal Judiciary online - often includes practitioner commentary about abilities, temperament, and demeanor, and lists noteworthy cases.
Daily Journal's Judicial Profiles (print only) - 1-2 page articles (sometimes 5+ years old), for state and federal judges having jurisdiction over California (SCOTUS, 9th Cir., Cal. district courts, Cal. state courts) - KFC980 .J83
The American Bench (print only) - for many includes "extracurriculars" such as fraternal or academic societies, civic organizations - KF8700.A19 A54
TheRobingRoom.com - like Yelp! for judges; not all judges are covered/rated. There certainly are ranters and trolls, but among the dross you can sometimes find real insight, honest and unbiased evaluations, or interesting bits of trivia about a judge's pet peeves and personality quirks. Worth a look if you have internet access while waiting at the airport.
Bloomberg Law's Litigation Analytics (federal district court judges).
Westlaw's Profiler - reports show tabular presentation breaking down your judge's written output (decisions issued per year, by case type, industry, law firm, etc.)
See the Caseload/Dockets section of this guide for resources and tips on getting an overview of a federal trial court judge's current docket, or an overview of the caseload of the court (e.g., the 9th Circuit Court of Appeals) in which your judge sits.
Scan legal news sources to find noteworthy cases decided or pending before your judge; such sources can also sometimes uncover trends implicated by your judge's cases, contextualizing with other cases or legal developments: