I would put such things in the bragging thread - why the separation?
The bragging thread encourages a focus on personal accomplishments and personal improvement. It becomes easy to assume that the only things of worth are self-focused actions. Not a bad thing when you want to focus on self-improvement, but it does not demonstrate any connection with saving the world at large. A "Saving the World" thread encourages considering large scale actions and effects.
At least this is my opinion. As Christian said, we would just have to see what the reception is. Might be unnecessary, might be helpful.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.