Flashcards are a favorite study method, allowing you to learn large amounts of material, then weed out the parts you already know. But writing out hundreds of index cards and carrying them around so ...

NotebookLM lets you upload PDFs, URLs, and spreadsheets with built-in citation checks, giving you trusted summaries you can act on quickly.

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...