A base design suggestion

The Core
The best core you can have is 6 x 6 tiles or 3 x 3 tiles (if you are looking for symmetry). Now what goes into that core is what is most important. Your whole design will fail if you have a bad core because it is the core which holds the base together.
Resources
Your resource placement is very important
The resources should be close to the center of base BUT NEVER put them inside a single bulkhead UNLESS you have high level walls and splash towers.
If all resources are inside a single bulkhead right when you get inside, rage 50-75 goblins, and they get all your precious loot. Try to split off the storages by MINIMUM of 1 wall, any tier 1 troops stuck on walls gets obliterated by splash.
Traps: 
These you should place in a very special way, put them in spots very troops are funneled into using walls, it is very hard to explain this with just text, so i highly suggest looking up some video's on Youtube that explain this subject in further depth.
(I recommend Flammy's strategy guides, they may be a little old, but they will still work)

Splash and Air Defense Tower Placement
Triangulation is essential. Always put splash towers in a triangle formation BUT have the mortar triangle and wizard triangle pointing different directions to alternate fast and slow splash damage. Mortars should be placed in a tighter/smaller triangle then wizard towers.
Triangulation of Splash and Air Defense Towers
With air defense it is the same concept. However, when farming they can be in a larger triangle and more spread out, especially because they have a larger range. The point of triangulation is to make it that wherever they attack from there is 2 splash towers guarding that side.
Any Extra Space in the Perimeter
You can either put collectors or barracks inside of the perimeter if you have extra space, most people put collectors inside to protect more of their resources but I on the other hand put barracks inside of the perimeter.
Why barracks you ask? Because they don't attract goblins. Goblins will keep running around a base until they have all the collectors which gives your splash and point defense more time to take them out. However, if their is a collector inside the walls they will be attracted to it and break the walls to get to it. Thus there are that many less layers of walls separating goblins from resources and hence they are more likely to delve deeper into your base to get those yummy storages. Its up to you really though.
Walls: 
This are another very special type of defense, which doesn't damage enemy troops, but will slow them down significantly, they are very important for the safety of your valuables, as they will allow for your defenses to have a clear shot at the attacking troops, while they will be puching away for a while.


Throwing of the opponent: 
another trick often used in village's, by making your design special, excellent and confusing. you'll throw of your enemy and make them more likely to fail .
Inferno towers: 
I will give these very special buildings are class on their own, as they will be the the most valuable buildings once you've reached town hall 10, always make sure the inferno towers are placed close to your most valuable buildings, but watch out that you don’t want to place them too close together. The reason for this is that attackers will be able to freeze both of your inferno towers with one freeze spell, making them useless.

A sincere thank to  http://www.clashofclansstrategyguides.org  for this article .