Aloe
Applying an aloe gel-based lotion prior to shaving dramatically reduces the rate of chaffing and facial dandruff.
It greatly reduces redness and irritation after an electric or manual razor.
It forms a protective layer, locking skin in and keeping the metal blades out.
Quality Electric Razor (Or clippers)
I often use clippers (going for a 5 o'clock shadow, or recently shaved look).
If you use a manual razor, consider trying a few premium models of electric razors. They provide a convenient experience, are often water-friendly, and can do a similar job in less time.
They can also be used to touch up around the neck and result in less irritation than manual razor blades.
Shower
It helps to shower before and after. If you don't have time, you can always use a warm compress to soften your facial hairs.
A similar practice can be applied to the legs, softer hairs are easier to cut.
Horse hair brush (for dry shavers)
Used for cleaning your hands, arms, shoulders, face, and neck of stray hairs.
Stay on top of shaving, but don't overdo it
Depending on your job, you may have to shave more often than others. But it is better to limit it to 3 or 4 times per week.
Conversely, you don't want to go more than five or six days, because then you get into clipper territory (razor blades are less effective on long hair).