There is another fairly simple strategy that also gives a high point total
Factories/Stadiums/etc. need a 2x2 or 2x3 open space to spawn. If you put down roads in a strategic maner you can cut control where they DON'T spawn, thus leaving valuable space inside which can later be filled with streets once you have a lot of them. It can get to point where a really reduced number of destinations spawn if you cover the whole map.
I managed to get to 7500+ points on my first try with this strategy