It's important to warm-up and stretch before you step onto your local golf course. Before swinging, make sure that no one is standing too close—it's a good rule of thumb to stand at least four club lengths away from the person swinging the club. Don't play until the group in front of you is out of the way. Stand still and stay quiet while others are in play. If your ball lands in the rough of the course (in high grass, brush, or trees), watch out for creepy, crawly animals and poisonous plants.
Check the weather forecast before going out onto the course. The general rule for avoiding storms is: If you can see lightning, flee it, if you can hear thunder, clear it. Get away from small metal vehicles like golf carts, and put your clubs away. Stay away from trees because they attract lightning, and avoid small on-course shelters—they are made to protect you from rain showers and provide shade.
Whether you're walking the course or riding in a cart, don't forget your water bottle. It's important to drink plenty of water before, during, and after your round. Need a rest? Sit down in a shady area, or under a tree—put a cold towel around your neck to keep you cool.