[jzelinskie]

I think if you go to the Keychain, you can configure it to put an icon in the top right tray that you can click on to lock your computer. I often find myself accidentally moving my mouse to the top right corner of my Windows and Linux machines to lock them now.

[ytjohn]

That is exactly what I do. I think that the combo I would normally try (Cmd+L) logs you out. I remember at one point trying to find the correct key combination, and the primary results were to put the lock icon up. That works find enough for me.

[krrrh]

Defining a hot corner in the bottom left in trackpad prefs has been my go to for years. It works fast and is rarely activated by accident.