If you're not very familiar with accessibility testing, this summary of Marie Drake's first 15 days of accessibility testing challenge is a great place to start.
In this great guide, Johanna South explains everything about exploratory testing and shows how to test and have fun at the same time. I especially liked the role-playing part!
You might have noticed that we work in an agile-everything environment nowadays and Kinga Witko shares her thoughts on this movement and what implications it has for us and the companies we work for.
There's a lot to learn from this comprehensive overview of various software testing metrics by Andrey Ostapenko where he describes what type of metrics can be used and how they can be measured using various formulas and analytics.
To make things clear, many soft skills play a huge role, but I agree with Andrejs Doronins that the one he describes here is crucial for software testers. One will not get far without it, for sure.
PS. If you can't access the full article, simply open the link in a private tab.