Just be a defensive driver and at all times be patient, specially with the locals who are as crazy drivers as Indians and Pakistanis. Basically just be focused on your driving and you'll be safe in the streets of Qatar.

If they flash their lights, or honk at you, give way. Maybe they have a date with Death. Or you can let 'em have a taste of their own medicine (excluding the locals). Flash 'em, honk 'em you can even engage in a staring contest with 'em. Lol.