I'm not sure if this is common knowledge or not, but I didn't learn about Cmd+Down (open file/folder) and Cmd+Up (go to parent dir) in Finder until recently. T

I'm not sure if this is common knowledge or not, but I didn't learn about Cmd+Down (open file/folder) and Cmd+Up (go to parent dir) in Finder until recently. This has completely changed my productivity in Finder since I can now navigate quickly without the mouse. I used to hate Finder a lot more before I knew this.