If there is an accessory that can work wonders during the day, it is the flash. No long technical article today but a very nice video by Profoto on the use of the flash in broad daylight.
The flash, like a sun
The flash, whether studio or cobra, is a real sun for the photographer, and as such it makes up for the absence of the celestial body when the weather is not good on the day of the shooting or working indoors. But much more than a sun, thanks to the different modellers that exist, the flash can create almost any light atmosphere.
To start with his flash
To begin to experiment with the possibilities of one or more flashes, I recommend reading the “Strobist” manuals, a movement specialized in handling the flash in all situations of street photography.