Zig Zag Towers to Landmark, DESS, Al Ahli around 15-20 mins light/no traffic, around 45mins to DESS and Al Ahli at busy times, like school drop off and pick up.

For the Pearl add 5-10 mins for Qatar University about the same as above maybe less a couple of minutes.

TV and Burger King Roundabouts are the headaches.

In general, do a defensive drivers course, and then forget everything they taught you, don't use your mirrors, don't leave a gap in front, don't signal, etc, etc. It's all very well to be taught to drive safely, but the safest way of driving is to drive like the majority, and just keep your wits about you.