I retweet when it's a friend asking for input from a wider group of people, when it's a cause I care about, or when something is simply hilarious.
I retweet when people want followers, I retweet contests and giveaways, I retweet when someone says something funny or important to me.. and I usually retweet when someone puts RT PLZ or something :o)
When it is something I find funny- interesting-or helpful
I retweet things that are funny or would be of interest to my writer friends. I also usually retweet when a friend is asking for followers.
I RT when someone is trying to get followers, when people say something that resonates with me, when they post a link I really enjoy and when I come across a competition or giveaway I like. I also RT when people ask for help or (occasionally) when talking about their books. Yep, that about covers it. :)
If it is something I believe others will want to read or know then I retweet.
I retweet when something is interesting. I want people to learn to trust that when I RT something, it is worth reading. NancyEadywww.workingmomadventures.com