I like the concept of Couchsurfing. Help people today and someday somebody will help you. I created an account here 3 years ago when I needed a place to stay on my first trip abroad and was surprised that there are so many people in the world who are ready to help you and make your trip more comfortable and interesting.

I really do like volunteering. It inspires me a lot. Once I volunteered at ultramarathon during the night (from early evening till late morning), it was raining, cold and I didn't sleep for a long time, but I felt such a surge of happiness! It is especially pleasant to listen to words of gratitude from the great people that you admire.