The key to a lot of memory systems is to link information to something that you already know. We all know our way around our own homes. Therefore, we can create a memory palace.  
Likewise, we all know a letter of the alphabet. But what if we knew objects or people that begin with a given letter of the alphabet and used that as a basis for memorizing information?  
I recently wrote a tiny little booklet to accomplish just that. Rather than spamming, let's give a concrete example:  
Let's say we converted the first 10 letters into familiar animals:

A – Ant  
B – Bear  
C – Cat  
D – Dog  
E – Elephant  
F – Frog  
G – Giraffe  
H – Horse  
I – Ibis  
J – Jellyfish

That was easy enough. But how do we use this to memorize information? Suppose we wanted to memorize a simple shopping list.

1. Bread
2. Apples
3. Milk

This is a simple list, and most people don't need mnemonics for it. But to illustrate the point of how this could be used, we introduce a framework called ASMR3 to creatively associate each item with the alphabet image. ASMR3 is simply a memorization framework which posits that memorable images must have the following properties:  
A - Absurdity  
S - Size, Sound, Sense  
M - Motion, Mash, Midst  
R - Replacement, Rhythm, Rated

1. Associate Ant with bread Imagine holding up an unusually giant slice of bread covered with hundreds of ants. Feel some of the ants falling onto your hands. Feel the crawling sensations as some ants move along your hands, wrists, and forearm. The bread has some holes in it due to being nibbled by ants. The ants are either red or black in color, with large heads and large mandibles.
2. Associate Bear with “apples” Imagine a giant, golden, glowing apple in the middle of a forest. The apple is about the size of a small house. See its golden surface gleaming as sunlight reflects off it. Different kinds of bears are hugging the apple and munching away at it. Notice the juice seeping and oozing down its outer surface. Hear the munching sounds as the bears take bites. Hear some of the bears growling and roaring.
3. Associate Cat with “milk” Imagine a giant upside-down baby feeding bottle filled with milk. On the kitchen floor beneath it, kittens are frantically trying to drink the milk. Suddenly, the milk spills onto the kittens and the kitchen floor. Notice their wet fur. The milk is warm, and steam rises from the wet kitchen floor.

For much larger lists, the advantage of using these systems becomes more apparent.

I developed new creative systems for improving memory with a new unique ASMR-3 framework