An interesting article discussing that there could be a rule of thumb about planets being double the distance from their neighbors. So the distance between Earth and Venus is double the distance that Mercury and Venus is and so on. Apparently there is still a lot of debate, on whether that is a fact or just a coincidence. Either way, I can use in my Worm Hole Earth universe.
I would probably use it in stories that need to have ships travel between planets, in-system. Also when the Explorer Guilds are nearing a new system and see larger planets further out. They would then use this rule of thumb to consider smaller bodies closer in and then guestimate their locations in the system.
The imagination and a little science can go a long way.