While it's possible to add the path to each app to your environment variables, it's less cumbersome (and in the past, consumed far less of your system's resources - though I'm not sure that's a meaningful concern anymore) to just create a folder specifically to contain .bat files that reference the other commands you want easy access to.
Set up the folder, add that ONE location to your system path (as described above), then just create a .bat file (in that folder) pointing to each command-line item. The other benefit of this is that if you prefer to run any of them with flags or switches, you can stick it right in the .bat, save yourself a few keystrokes.
Might be 6 vs. 1/2 dozen, but it just seems cleaner to me.