What about creating care packages for newbies (big bag, some food, a tool)....
Participating in projects....
Making things to sell in auction....
Making every single thing you can with your tools (opening new recipes)....
One thing I've been thinking about doing is creating a contest and then giving the winner(s) currant-prizes.
There are probably a number of Achievements you don't have. Check the encyclopedia to find a list of all of them. You probably have not been everywhere. Look at the travelers Leaderboard to see how many locations you have found and then go find the rest. try to rise on all of the Leaderboards. Learn every skill, make every recipe, etc. There must be many things you have yet to do.