If you need some inspiration, Helena Hrubesova published a solid list of ten skills and attitudes that can help you become a better software tester.
Testing databases is not trivial as Kovid Rathee explains. Luckily, he also shares some solutions for the problems around it.
We all want to build quality software, and testing is a critical part of that challenge. Remember that quality is the destination, and that testing is only the vehicle we’re using to help us with that journey
Here's a good read where Alan Page tells us why customer plays such a huge role in defining quality of a product and how testing can help teams get better at it.