Speak up when it’s called for: Fight injustice, stand up for others, etc. but shut the F up if you’re thinking about offering an unsolicited opinion or advice about anything you’re not personally an expert in.
Talk to them about how dangerous it is to buy pills online. Fentanyl is ubiquitous and lethal in small doses. Never never take a pull that wasn’t prescribed or purchased legally.
Take a CPR class together.
Emphasize importance of staying certified ( or making a habit of watching an online course every year on the same day, like the day after Thanksgiving or something like that.
The Language of the Universe: A Visual Exploration of Mathematics https://www.amazon.com/dp/1536215058/ref=cm_sw_r_cp_api_glt_fabc_R83V51QC1RGYVEZ4ESMQ