Ask HN: How do you make productive friendships?

I'm hitting a wall here.

I tend to find friendships based on relaxation or wasting time easy to make. I also find friendships based on conversation (especially negative ones) also easy to make. However, the friendship I want to make is a profitable one. I'm stumped on how to do this.

I find people tend to bail faster than I can count to 3 if I suggest an activity which requires tedious work. I would love to one day say "look, this charity needs a website, how about we create a small site to help them?" to my friends and seeing us make it happen instead of seeing a everyone's jaw drop in horror to completely change the conversation to involve only fun things.