Great read @simplifylife, I learned a lot of this in biochemistry 1 and Microbiology 1, thank god I didn't have to learn all the diagrams, I won't be needing them for veterinary medicine, just knowing they exist is enough.
That OIL RIG mnemonic will surely help me in the future, i tend to think of it in another way, I know electron is e(minus), so if they are minus when you gain them you are being reduced, so electron gain is a reduction, while loss is oxidation