If you liked the Naruto manga, the Anime-Planet community thinks you'd like:
Yuusuke is a street-fighting, class-skipping juvenile delinquent. Killed in an unexpected act of kindness, he thwarts the spirit-world bureaucracy and ends up with a second chance at life... as infant prince of death Koenma's Spirit Detective! Simultaneously cheered on and kept in line by Keiko Yukimura, his childhood friend, he is joined by a spiritually aware human, two demons on parole, and guided by a much too lively ferry girl of the dead. Together they plow through demons, tournaments, hijinks, intense "martial arts" training, cross-dressers, dungeons, conspiracies and bad puns alike. At the end of the day, what's it all for? Kicking butt and saving the world, of course!
Both the main characters in Naruto and Yu Yu Hakusho are both idiots that do whatever they want whenever they want, but they always have time to do their job. The only bad thing is that the job is almost always a dangerous, if not life threatening job, but the good thing is that they are almost always with a group of friends that will support them. Before you know it you will be thrown into several different action packed adventures with these two lucky idiots that make you wanting to know more of what's going to happen.