f/8 and be there
F/8 is typically the most optimal aperture for everyday lenses.
35, 50
Wide and telephoto touch somewhere between 35 and 50, which means every lens over 50 is called a telephoto and every one below 35 is considered wide, making 35 the longest wide-angle and 50 the widest telephoto.

Seeing Layers
The 50mm lens is more front-to-back than side-to-side and compresses things together, perfect for layering foregrounds over backgrounds.
35 is a lonesome focal length
A 35mm pushes backgrounds away and magnifies foregrounds.
The Rule of Thirds
View something, then around and past it.
Compression and Separation
Lens selection is a creative choice made before stepping outside. A 50mm is how a photographer sees; a 35mm is how one thinks, and a 135mm is how one sees and things while driving.