I Don't just look at the blue line, you gotta look at the upcoming direction too. A basic understanding of the next roadname you're turning on to/highway exit is all you need. Then just add the screen to any point in your rotation of rear mirror > left side mirror > rear mirror > right side mirror > front windshield [EVERYONE SHOULD BE DOING THIS ANYWAY] and you're good to go.
I feel like the voice prompts are especially unhelpful if I am unfamiliar with the roads. Looking at the map shows me the next one or two turns at a glance and also shows me which lanes I need to take.