A slightly different perspective than what I've seen in responses so far.
Best money I've spent on professional development is spending time with people having completely different backgrounds and perspectives to mine.
Some examples include traveling abroad, attending meetups, conferences or networking events, talking with people who have interesting things to say, seeking out resources or people that offer counter points to your current thinking on things.
Best money I've spent on professional development is spending time with people having completely different backgrounds and perspectives to mine.
Some examples include traveling abroad, attending meetups, conferences or networking events, talking with people who have interesting things to say, seeking out resources or people that offer counter points to your current thinking on things.