It depends on why you are sad. However, if it's just a short-term down-in-the-dumps exercise will help (changes your brain chemistry - running REALLY helps), chocolate also has a chemical that will give you a lift, work (don't just sit around thinking about whatever makes you sad), and chatting with friends about whatever is making you sad.

Avoid the transfer of your anger and sadness to others ..........

Do something that relaxes the thoughts that make you sad. Pick up a hobby you enjoy. I used to go cycling err but I don't know how to change my tired plus they gave me thighs of steel!! >:[ Supposed to slim me down but obviously not - haha! I'm usually sad when I'm travelling alone because I have the time to think so instead I admire the scenery whether it's industral, country or sea side. There's a building on m way to college that looks like it's smiling and always makes me happy when I see it! Sometimes doing something creative like recordeding yourself singing and/or dancing andwatching how silly you look can cheer you up. That and listening to calm, heavy guitar themed or atmospheric music like nastyona, Nouvelle Vague and moi dix mois lets my emotions just flow out beautifully. Please cheer up, speaking to close friends or just a phoneline can help!