Here's a couple of things you should remember when playing with airsofts

• Always wear eye protection.
• Always treat an airsoft as if it were loaded until you visually check it out.
• Always have your airsoft pointed in a safe direction.
• Always learn how your airsoft works before handling it.
• Always keep your airsoft unloaded when you are not using it.
• Always store your airsoft and ammunition in separate locked places so no child has access to the airsoft.
• Never point your firearm in any direction you do not intend to shoot. In particular, never point your gun in the direction of other people.
• Never assume that a gun is secure, i.e. some guns have excellent security systems to prevent accidental firing (e.g. when dropped), others don't.
• Never put your finger on the trigger unless you are ready to shoot.
• Never pass your firearm to anybody until you have checked that it is unloaded.
• Never carry your gun with the hammer cocked.
• If you have to carry your gun loaded, always point it in a safe direction (e.g. the ground).
• Be sure of your target and what is beyond it.
• Treat all guns as if it's loaded. This includes airsofts. Especially with airsofts. AEGs and gas blowbacks will leave at least one BB in the chamber so even if you took the magazine out the gun may still be loaded.
• Be concious of where the muzzle of your gun is pointing.
• Be discreet. You know it's not a real gun but others may think it is.
• Be aware. Always know what's around you when you shoot.
• Watch for ricrochets. These BB goes everywhere so see rule one.
• Be aware of the area behind the target. You don't want to break anything if you miss or the BB goes through the target.
• Remember it's all fun and games until someone looses an eye.

well this is alI can think of off the top of my head. Let me know if you can think up some more safety advices.