The Law Librarians’ Society of Washington, D.C. is an association established for educational, informational and scientific purposes with a geographical focus on the Washington, D.C. region. Luckily for us, they have compiled a great online Federal legal source book!
The Legislative Source Book contains many pdfs with information on how to research various types of Federal information. There are documents explaining how to located current legislative and regulatory activity, how to locate United States Statutes and Code, as well as an overview of the Congressional Record and Congressional Serial Set. If you want to learn how Federal Laws are drafted they explain it! Most information is for Federal information but there is some information on State Legislatures, laws and regulations as well.
Overall, this is a very comprehensive source on how to find current and historical Federal Legislative information.