Particularly interesting IMHO is #1
Let’s say you have a business that sells an awesome service to attorneys. A simple search on Twitter will turn up thousands of mentions of the word attorney, but many of them will be from people talking about this or that attorney or the need to hire or not hire one. That’s probably not very helpful for your purposes.
However, if you cruise over to Google and use a handful of operators from the Google shortcut library (more on that here) you can create a search that plows through Twitter and gives you a list of all the users that have the word “attorney” in their title (username and/or real name) – Click on this search phrase and see what happens – intitle:”attorney * on twitter” site:twitter.com– what you’ll find is a handy list of attorneys of one sort or another on Twitter.
Without getting too technical, this search basically asks Google to look in the title attribute of profile pages on Twitter – obviously you can use any word to replicate this. The * tells Google to find the words “attorney on Twitter” without regard to order or other words – “on Twitter” appears in the title of every profile page so we need that term to make sure we search profile pages only.