Tell me about rapid memorisation of long-term knowledge

Sorry to make two of these within a short timeframe.

The matter is this. I have a ton of hastily written notes with all the main points of books. I am supposed to memorize these, but there are so many of them, and not all of them will be used initially.

Here is an example of some notes I took from a book on clothing style:

Clothing tips for the slim man:
‘- Go for horizontal or diagonal stripes, preferably horizontal, and one big one should suit you well. Basically, horizontal is for width and vertical for height. So diagonal are good.
- Avoid monochromatica = you want a slight change of color in your outfit, not single-coloredness
- Avoid big prints
- Turtlenecks are good (where it extends and hugs part of your lower neck). Avoid v-necks. Basically, V-necks point to your height while turtlenecks point to your width.
- Thick or bulky material is okay
- Don’t have stuffed pockets that draw attention to midsection

I have loads upon loads more of these, and I wish to memorize them. But how do I do so? If I was taking a test with multiple-choice tomorrow, there would be some recollection involved, but many of these tips cannot effectively be remembered by association, since there isn't always anything to associate them with.

The tips on memorization online seem to focus on verbatim and test-taking.

Use your imagination. Picture yourself or anyone looking silly and fat wearing horizontal stripes, see how big they make your butt look! And then picture a tall skinny person wearing vertical stripes. The best way to really learn and memorize a large amount of information is to associate it with something familiar in a visual image, utilizing both cerebral hemispheres.

For example if you need to memorize a list of words: road, rabbit, mirror, blue, finger, door...etc. etc. etc. ...you would want to visualize something like this..."A road, that leads to a rabbit, looking into a mirror, the mirror is blue, your finger is blue, because you shut it in the door!" Got it memorized? :)

A lot of this stuff should already be common sense though lol.

Visualization really is a good way to memorize things, and to expand on what Nina said, the crazier and more outrageous the mental image, the more likely you'll remember it. So when you picture a dude with a horizontal-striped turtle neck, maybe the horizontal stripes are 6 feet long and are somehow sticking out of the sides of the shirt, and when he walks by you he keeps hitting you with his stripes... and around his neck is an actual live turtle, and it's poking out it's head and looking at you... etc. The crazier the better, and go for images with lots of action, especially if it somehow includes you in the action (e.g., the man hitting you with his stripes).

There are lots of great mnemonic systems out there, some of them quite sophisticated, and most of which rely on some form of visualization. Some examples:
Peg words
Method of Loci
Phonetic numbers
Link system
Different systems are better suited for memorizing different types of information, so it's good to be familiar with lots of them to have in your toolbox.