I'm not sure it makes a big difference. You're going to have to waste a HUGE amount of time doing things the inefficient way (whichever it is for the task at hand) before it will be the equal of arriving late for even just one day, or taking an extra 5 minutes at lunch.
Things I suspect you'd be better off getting good at than keyboard shortcuts:
* Regular expression search and replace
* The command line (default Windows command prompt is fine), and the POSIX-style command line tools (default Windows command line tools are NOT fine)
* Some kind of popular scripting-type language (perl/python/ruby/whatever/etc.), if you don't know one already
I like my keyboard shortcuts, but the above have saved me much, much more time over the years.
Things I suspect you'd be better off getting good at than keyboard shortcuts:
* Regular expression search and replace
* The command line (default Windows command prompt is fine), and the POSIX-style command line tools (default Windows command line tools are NOT fine)
* Some kind of popular scripting-type language (perl/python/ruby/whatever/etc.), if you don't know one already
I like my keyboard shortcuts, but the above have saved me much, much more time over the years.