Rogue Encampment

Top right

Top right map can be spotted when you leave the top gate and road takes a sharp right turn. From here you want Cold Plains to Stony Field road to be on the right side as well. From there on here's what you can be certain on:

• Passage always spawns as a hole in the middle. This setup is faster compared to a wall hole spawn.
• Dark wood has a fast exit to Black Marsh.
• Black Marsh never has a bridge in the middle. Exit spawns bottom right.
• Outer Cloister waypoint is a nice short walk away from Black Marsh.
• Outer Cloister waypoint always in the same position.
• Kurast Bazaar entrance is always in the left corner. (Spotted by BloodRaven)
• Quick right corner Plains of Despair entrance seems very common, but just keep going straight if it didn't spawn there, because left side is impossible).
• Quick right exit to Outer Steppes in Plains of Despair always gives top right oriented Arreat Plateau
• Straight exit to Outer Steppes always gives top left oriented Arreat Plateau (Thanks, BokserKabaty!)

Jungle

Helpful image by tpscrollbot to get a sense of the size of the Jungle. It's made for original D2, but D2R tiles are all the same and Jungle functions the same way.

• Each Jungle area is 2 tiles wide and 6 tiles long.
• Jungle areas can only have connections on tile 3, 5 or 6. • If Spider Forest and Great Marsh is connected on tile 6 then Great Marsh skip is impossible. • Each Jungle area has 3 camps. • Camps of the same area are never connected. • Tile 6 camps are much more likely to be connected to a new area.

River of Flame

I learned this from BokserKabaty. This method is superior to the "H" shape method, because you can tell much earlier which way you need to go.

When going towards Chaos Sanctuary from River of Flame waypoint then often you have tiles where one side is a dead end. Luckily these tiles always look the same and you can memorize which way to go. On most of them you want to take the left side.

Turn left

Turn left when you have a fire coming out into the side of the platform from the lava.

Turn right

Where used to be fire is just a bit of smoke. Difficult to see from the image, but the smoke is on the top left where there is fire on others. Turn right when you see the tile with just smoke.

Tip

Personally I just look out for the tile with smoke on it since it's the only one where you have to turn right. Other maps go left or through the middle. Maps that go through the middle are easy to spot because they don't really give you an option to go anywhere else.