This subject can be very creative and greatly enhance the appearance and operation of one's layout.
I also think this will give us an opportunity to learn a lot from each other.
I will start us off by focusing on Popsicle Sticks.
About 30 years ago when my oldest of 2 older sisters learned I was becoming an enthusiastic model railroaders as an adult, she went to an arts and crafts store and bought me a box of 1,000 Popsicle Sticks as a Christmas present. Initially, I had no idea how to make use of them but over time I have done so big time in a myriad of ways. And, I still have well over 500 of them left after all this time.
This morning I noticed the front exterior wall of my Yankee Stadium was leaning forward. To remedy this, I cut a Popsicle Stick just the right size to wedge between the outside rail of a nearby track and the exterior wall so it pushes the wall back into a more upright position as shown below:
You can see the beige colored piece of Popsicle Stick in the lower center of the above photo just to the left of the orange colored booth and just below the signal bridge.
Then, I used another scenic tip and trick that virtually all of us know about: I did a cover up with lichen, as shown below:
Now it's your turn to share any and all of your scenic tips & tricks. Arnold