AutoCAD is a powerful tool for creating 3D models, but navigating and viewing those models in 3D can be a challenge for beginners. Here are some tips for effectively viewing in 3D in AutoCAD.

1. Use the ViewCube: The ViewCube is a navigation tool that allows you to easily orient the 3D model in different views. Click and drag on the ViewCube to rotate the model, or click on the different faces of the cube to switch to different standard views.

2. Use the Steering Wheel: The Steering Wheel is another navigation tool that can help you navigate in 3D. You can use the Steering Wheel to pan, zoom, and orbit around the 3D model with ease.

3. Set up a 3D workspace: AutoCAD offers different workspaces for 2D and 3D drafting. Make sure you are in the 3D modeling workspace to access the full range of 3D viewing tools and commands.

4. Adjust the visual style: AutoCAD offers different visual styles for viewing 3D models. Experiment with different visual styles such as wireframe, hidden, conceptual, realistic, and more to find the best representation for your 3D model.

5. Use the 3DORBIT command: The 3DORBIT command allows you to orbit around the 3D model freely. Simply type '3DORBIT' in the command line and then click and drag to orbit around the model from any angle.

6. Learn the shortcut keys: AutoCAD offers many shortcut keys for navigating and viewing in 3D. Learn the shortcut keys for commands such as zoom, pan, orbit, and more to speed up your workflow.

By mastering these tips and techniques, you can effectively view and navigate in 3D using AutoCAD. Practice using these tools and commands to become more efficient at 3D modeling and visualization in AutoCAD.