Didn't really know where to ask this question so throwing into the wild!
Currently working an Senior role as an support engineer for an MSP with seven years into my IT Career, constantly exposed to interesting setups and situations. I've deployed Servers (AD, File Servers, DHCP), Network gear and automation with both Azure and Powershell. The businesses I work with are typically SMB so nothing to complex in terms of setup or maintaining.
I'm wondering, what other things I could be learning or advancing my knowledge of the wonderful world of IT? Obviously an broad question, but getting some ideas would allow me to investigate and deep dive during my down time or leisure.