Magnetic chargers for all my devices: https://www.aliexpress.com/item/1005002239613192.html
For context, I never transfer data through cords for my devices. I have semi-permanently affixed these chargers to my devices and now I have chargers that work for all of them. Life-changing purchase.
Cheap Earbuds: https://www.aliexpress.com/item/4000507169624.html
I bought 10x of these for ~1 USD each, and it put a pair in every bag, box and jacket I traveled with so I'd always have a set with me no matter what. Very convenient.
Metal card wallet: https://www.aliexpress.com/item/32808543399.html
Going on 3 years, fairly durable for the price. Reduced wallet size by forcing me to discard (pun intended).
Sleep mask: https://www.amazon.com/dp/B07KC5DWCC
Also life-changing. I have 16 windows in my room and this allowed me to finally sleep past daybreak.
Ear protection: (not exact pair, but similar) https://www.amazon.com/12010-34dB-Highest-Safety-Muffs/dp/B0...
Combined with the aforementioned cheap earbuds, these replace 200+ USD noise cancelling headphones for ~15 USD total and allow me to concentrate at work.
Rechargeable batteries (AAA and AA), and recharger:
I use these for everything that requires batteries.
The Phoenix Project (Book): https://www.amazon.com/gp/product/1942788290/
This book helped me change my career trajectory in a positive way.
The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win
[BOOK] The Pheonix Project
Podcasts have been a great way for me to keep up. I mess around in my home lab too, but work and family growth eats more and more into that time (not a bad thing!). Finding ways to fill in the gaps like podcasts on commutes/exercise, reading a book instead of binge watching a whole season of Doctor Who, or using a good RSS reader to effectively follow blogs will help you prioritize what you want to play with in the lab.
As far as retention, I find I retain information the best if it is learned from breaking something or by teaching someone something new.
I actually found Gartner's article .
Per the norm, this hit development and operation's technologies first with "CI/CD", "Infrastructure as Code", and "Software Defined Networks." Gartner is pointing out that the ability to automate setting up security technologies and get the configuration scripts/templates in source control is an obvious next step in full software and environment automation.
tl;dr "Software Defined Security is the solution to getting your security tools in your organizations DevOps CI/CD pipeline" is probably going to be at the top of every sales slidedeck in 2019.
My biggest take-away (and it's served me well as a team lead) is minimize work in progress (WIP). In practice, that meant encouraging contributors to focus on getting opened PRs reviewed/merged/deployed rather than opening new ones - which has cascading benefits.
A related takeaway is that when resources (engineers, key machines) are planned to be at capacity, they have no slack for dealing with unplanned work, so it's good to plan for resources to be under-utilized at certain times so that they can be more agile.
I've never seen "The Profit" but I'm looking forward to watching it now!
 - https://www.amazon.com/Phoenix-Project-DevOps-Helping-Busine...EDIT: for link to book
EDIT: for link to book