I have many travel projects, but visiting all the countries was the first big one. It was not easy. Especially when you are young and don't have a lot of money. I had to do things differently, like hitchhiking (with more than 1,000 cars), eating cheap meals at supermarkets, and staying with local people. But I'm glad that I made it. I wrote an article about it on my blog:
How I visited every country in the world on a budget.