I frequently have racing thoughts at night and Trazodone does help. If you take a high enough dose it will knock you out. Besides that you could try going for a walk or doing something to tire you out, although that may just wake you up more. I usually take a Trazodone and lay in bed. You may also want to stay away from things that you know could trigger mania in the evening and at night. For me if I start surfing the web or writing I get excited and it keeps me up.