- Using usernames that have "itsme" or "iam" (or "akosi" in Filipino) in them. Because unless you're a celebrity, you're not the John Michael that the masses should be clamoring to follow but really just another John Michael on Twitter. Leave such usernames to Leighton Meester and Ruffa Gutierrez.
- Retweeting (or quoting) instead of simply replying. Because it's like shouting to an entire room what you should only be saying—normal, non-palengkera tone of voice—to one person.
- The misuse of hashtags. Hashtags are used to categorize tweets, join in on a conversation about a trending topic, or make your tweet extra witty (note emphasized word). They should be brief, consisting of a maximum of four simple words with no conjunctions, and they should never be used on Facebook status updates, but I digress.
- The use of the word "mode." Enough said.
- The profuse appearance of a colon followed by two closing parentheses which on Yahoo! Messenger would turn into the laughing emoticon () but which on Twitter wouldn't, and since it wouldn't, I have to imagine the tweeter repeatedly laughing his or her head off like the emoticon. And that simply isn't a pretty picture.
- The use of tweet condensers like TwitLonger. It's cool to use them once in a while, but if you have to do so with almost every single tweet, maybe you should consider moving to Tumblr.
- And lastly, saying (yes, saying too, not just tweeting) "twit" when you mean "tweet." Look up the meaning of the first word. Unless you want to be called that, say this with me: TWEEEET.