My suggestion is for all 'warp preventing' objects that you have to be 3000k from be more easily noticeable.. A targeting ring or something around them to make them stand out so you don't accidentally head towards something that prevents you from warping. It's annoying trying to decide which direction will get you 3000k away from everything only to find that 2800k away from one object you start getting closer to another object.

Roshcar

I think you will find that most sectors have a relatively 'flat' layout. Everything pretty much lies along the same plane, much like all the planets in the solar system lie along the same plane. Generally, the quickest way to get 3000m from something is to turn perpendicular to that plane.