Not a rant, but still relevant:
GET YOURSELF A PROPER ERGONOMIC CHAIR!

I'm pushing 30, but have been coding/messing with computers since i was a barely a teenager.
I code at work and i code at home, and while i consider myself decently fit and observe decent routine regarding standing up regularly at work, my lower back is still all kinds of fucked. (Facet Joint Disease - look it up if you are bored)

This is SUPER common in our field and i figure most of you here are working more and more from home, from you couch probably. This is killing your back, and let me tell you, coding is freaking difficult when you feel like the thousand knives of the management layer is in your back literally instead of metaphorically.

You will be sitting in the same damn chair/set of chairs for the majority of rest of your life, make sure its good, preferably before your back is screwed.