Speaking of bags, thought I'd share my absolute favourite (along with a little how I use it). It's the Thule Subterra 25L Backpack, and I've missed using it since my uni converted
Thule Subterra 25L Review | Pack Hacker
Thule Subterra Backpack 25L | laptop, hat, bicycle | Thule Subterra Backpack 25L Commuter-inspired backpack with expandable, quick-access compartments and dedicated protection for a 15" MacBook® plus... | By Oribags.com | Facebook
The THULE Subterra Backpack 25L is one of our most convenient backpack suitable for your daily commuter adventure. (Now on 𝟮𝟬% 𝗢𝗙𝗙!!) Comes with... | By The Planet Traveller | Facebook