Beelzebub, Danshi Koukousei no Nichijou Recommendations
Both series are comedies that are centered around high school students. They also have really funny and likable characters. So if you liked Danshi Koukousei no Nichijou, you should definitely check Beelzebub (and reverse). Why? Because they are hilarious! Do you need more?!
Highly compressed hilarious Randomness. Must I say more?
Warning: Danshi Koukousei no Nichijou starts out a little slower and takes a few episodes to get epic, while Beelzebub starts out good but then gets this annoying thing called a "plot". So you can just stop watching after episode 20 and consider it completed. Unless of course, you don't mind having hilarity polluted by "plot".