In biblical times, (mostly in the old testament) this was a common practice, especially when it came to making key decisions.
I know that Jesus sent us the HolySpirit as a comforter and witness to replace such practices, but there have been times when I needed to make certain important decisions and had to resort to casting lots (usually tossing a coin). This is mostly due to the fact that I felt the HolySpirit was silent on the matter, or I wasn't sensitive enough to hear Him.
Many Christians see this as a form of divination. What do you think? Is casting of lots still a biblical today or is it an outright sin?