Times come when you need to level a pool table, a stove or anything that needs to be leveled. They seem to look awkward when tilted to one side. It is irritating to see it is obvious for liquid to flow to just one side or higher on one side in a glass or container.
To make surfaces or things sit squarely flat horizontally, a carpenter's leveling tool is used for that. It is not common household tool so chances are you would not have one at home. How to make a home made temporary one is really easy. Take a glass or plastic jar with a cap. Draw a line about an inch high from the bottom around the jar. Put water in the jar up to the line you have drawn.
By setting the jar in the middle what you want to level, you will see what side needs to be elevated. The lower side will show water in the jar to be higher than the line. That should solve your problem on a surface that needs to be leveled.
After buying a new desktop, I had a dilemma on how to fit it next to our other desktop that is on a ready-made computer table. So I had to "trim" down extended parts of the ready-made table. The space next to it now had the same dimensions as where old table is positioned. I have a small table 13.5"wide x 24"length and 26.5" high where tool boxes were on, and in it. Then there is also a 20" x 26" table top covered with formica that I fixed on the small table top. That's a temporary table for the new desktop.
I was considering to buy a computer table or maybe have a custom one made. It took me about two weeks trying to find one with the dimensions needed at the same asking around for the cost of a custom made table. The prices I canvassed were at least Php 2,000.00 ($50.00) and above. Also I did not like the materials they used for ready-made ones, and, custom made with the materials I like will cost at least twice!
Relying on what I know I can do, I found a steel frame of an old CPU, stripped it off until I had only a sturdy 3-sided frame. Installing it upright, it was enough to clear the 20" LCD monitor. The 3 pieces of wood I trimmed off the other table was good to be cut into size to serve as table top of the steel frame where the new CPU is to be put. I joined the 3 pieces of cut wood first with contact cement and screwed on small galvanized plates on the joints. I also supported the top frame with the use of aluminum square tube to fully support the weight of the CPU.
By setting the jar in the middle what you want to level, you will see what side needs to be elevated. The lower side will show water in the jar to be higher than the line. That should solve your problem on a surface that needs to be leveled. 
