Wiley Current Protocols includes over 24,000 step-by-step techniques, procedures, and practical overviews that provide researchers with reliable, efficient methods to ensure reproducible results and pave the way for critical scientific discovery. There is a broad subject coverage for researchers, with sections in Plant Biology, Microbiology and Essential Laboratory Techniques, which will be of particular use to undergraduate students.

Springer Nature Experiments brings together content from Nature Protocols, SpringerProtocols, Nature Methods and Nature Reviews Methods Primers, enabling researchers to find and evaluate protocols and methods in the life sciences.

Cold Spring Harbour Protocols is an interactive source of new and classic research techniques. Fully searchable by keyword and subject. Coverage includes cell and molecular biology, genetics, bioinformatics, protein science, and imaging. Regularly updated.

JoVE: Journal of Visual Experiments has educational videos demonstrating science concepts and laboratory methods in a visual format. JoVE videos also bring to life the intricate details of cutting-edge experiments enabling efficient learning and replication of new research methods and technologies.

Methods in Enzymology is a book series consisting of over 650 volumes and is a laboratory standard for methods and protocols in the field of biochemistry. Each volume and chapter includes background knowledge, specific research techniques, detailed experimental procedures and methods with video elements.

Bio-protocol is an open access protocol journal. It publishes peer-reviewed step-by-step protocols in any area of life sciences, and includes categories for Plant Sciences and Microbiology. 

Find more Methods in Molecular Biology.