The mnemonic for rememering the names of the essential amino acids:
Look There, Look There, VIP Man
The essential amino acids are:

Leucine
Threonine
Lysine
Tryptophan
Valine
Isoleucine
Phenylalanine
Methionine

Some other amino acids are considered to be essential under certain conditions.

The mnemonic for remembering the components of the auditory pathway:
SLIMA

8th nerve
Cochlear nucleus
Superior olivary complex
Lateral lemniscus
Inferior colliculus
Medial geniculate body
Auditory Cortex (Brodmann’s area 41)

The first 2 components are not included in this mnemonic. Just remember that the auditory pathway starts with the auditory nerve, goes to its nucleus (cochlear nucleus) and then suddenly turns into slime (visualise this) - SLIMA.

Click on image for an enlarged view
Based on illustration created by Patrick J. Lynch

Mnemonic – “Live Frankly To See Absolutely No Insult”
The nerves passing through superior orbital fissure are (from top to bottom) :

Lacrimal nerve
Frontal nerve
Trochlear nerve
Superior division of oculomotor nerve
Abducens nerve
Nasociliary nerve (branch of ophthalmic nerve)
Inferior division of oculomotor nerve

Differential diagnosis is the systematic method by which diseases of  similar presentation are distinguished by considering their various features. VINDICATE is mnemonic which helps to remember the various types of diseases to be considered in a differential diagnosis. VINDICATE stands for

V – Vascular
I – Inflammatory
N – Neoplastic
D – Degenerative / Deficiency
I – Idiopathic, Intoxication
C – Congenital
A – Autoimmune / Allergic
T – Traumatic
E –  Endocrine

Menmonic – Very Sick People Must Take Double Tablets
This is decoded as follows:
Fever with rash appearing on (approximately)

Day 1 – Varicella
Day 2 – Scarlet Fever
Day 3 – Small Pox
Day 4 – Measles
Day 5 – Typhus
Day 6 – Dengue
Day 7 – Typhoid