These free tools make NotebookLM twice as useful.

People use NotebookLM for more than just research. They use it to prepare meals, find help with car and electronics manuals, create quizzes from their research work, and even combine it with Obsidian notes for better understanding.

But at its core, NotebookLM remains a research tool that works in conjunction with your notes. So, when you need more context, turn to Perplexity for better sources, Quizlet to export key concepts as flashcards, and Obsidian as your preferred note-taking app to keep all your research notes structured. By combining NotebookLM with frequently used tools, you can make it doubly useful.

Perplexity

Quick context when NotebookLM cannot search outside your source.

Many people have used Perplexity, especially with its Comet browser , since its launch, and it has become their go-to tool whenever they need more context about something they can't immediately understand. For example, let's say you're watching a video and the presenter says something like, "This product has one thing to note." Don't sit through the whole video just to figure out what that thing is. Ask Perplexity, and the answer will appear with verifiable sources.

That rapid exchange is why combining it with NotebookLM makes sense. Perplexity is excellent at gathering and extracting up-to-date information from the web, but it's not built to organize that research into finished products. NotebookLM, on the other hand, excels at structuring, analyzing, and transforming curated sources into useful things like reports, presentations, and content plans, but it can only work with what you provide.

Quizlet

Transform NotebookLM flashcards into an effective learning system.

NotebookLM now allows you to create your own Quizlet-style flashcards, which are helpful for memorizing key terms, important dates, and core concepts from your sources. You can even set the difficulty and choose the number of cards. But Quizlet, the oldest vocabulary flashcard platform, excels when it comes to learning science.

Quizlet offers spaced repetition, a learning method where the app shows you cards you frequently struggle with and spaced out the time between showing cards you already know. Numerous studies have shown this to be one of the most effective ways to retain information long-term. Additionally, Quizlet can transform your notes into various modes such as Learn, Write, Spell, and even turn them into games to make repetitive learning more enjoyable. It also has a dedicated mobile app so you can access your flashcard sets anywhere, offline or online.

Obsidian

When first integrating the Obsidian archive into NotebookLM, many people had a simple goal: They wanted to better understand the hundreds of notes they had accumulated over time. Obsidian is great for storing and organizing notes locally, with backlinks, graph views, and a well-scalable folder structure. But its built-in search functionality only helps to a certain extent when you want to compare ideas between dozens of files or find patterns you've never encountered before.

NotebookLM fills that gap. It can summarize your documents, create quizzes and flashcards, and allow you to question your entire collection of notes. What it can't do is help you organize anything over the long term. It doesn't have a real archiving system, and the notes you create in it aren't designed for permanent storage.

While Obsidian handles persistent storage, formatting, and structure, NotebookLM handles AI-based querying, summarization, and analysis. Neither tries to do the other's job, which is why this combination works so effectively. Even if you don't use Obsidian but another note-taking application, you can still do the same as long as that application can export Markdown or PDF.

NotebookLM works well, but it would be even better with the right tools included.

NotebookLM needs no fix. It delivers on its promises, which is to keep the AI ​​connected to sources so you don't get mindless, illusory information presented as research. It's useful when used independently, but being useful independently and being useful as part of a workflow are two different things.

You can start using Perplexity, Quizlet, and Obsidian for free, and you've probably already used at least one of them. If you've been using NotebookLM independently, try integrating Perplexity into the early stages of your research process and see what changes occur.