Lol Rhymer, you make it seem like it's some very important skill! ^.^
But anyway, sometimes, if you're trying to force something out of you, may just take a break to relax, and try again soon after. It helps just to refresh your brain. Also, if you look at people's examples of roleplays, you can gather up some ideas on what you can type or reply, and you can do the same thing when your stuck on a character. I've done it before. And welcome. Just call me Knight or Sleepy.