I like both street o and bush o for the way they let you switch off. Bush o is particularly good, especially when you get lost - you can think of nothing else. When you get back you feel like you've been on a holiday!
If I could have a bottle of "Street-O switch off" in the cupboard it would be a god send.
If I could only find a way to switch off similarly at night anywhere between 9:30 pm and 1:30 am my sleep patterns would be dramatically improved!
I'm no good at sleeping either - except when it's time to get up!