Increase the GPU ram and hard disk doesn't matter that much specially Nvidia processes they r magical

Use GPU rendering, it's magical

Don't use unnecessary emission materials, Use less render samples, Use less geometry, Hide objects that are not visible to the camera, Use lower res materials and less reflective materials if you can

if u are using blender2.8/2.9 u can reduce the render samples and the use denoise node in composition.

Increase RAM and processor