Basics of lead safety:
1. If you cast bullets have good ventilation;
2. When ever you handle or work with lead - casting, sizing, reloading, etc. have protective clothes that are worn just for that (tyvek coveralls are inexpensive, light weight, comfortable, cool, and can be used multiple times);
3. Always wash hands and face after handling or working with lead;
4. Shower and change clothes after a trip to the range - indoor or outdoor;
5. Carry some type of disposable wet wipes in your range bag to clean up with during and after shooting;
6. Never handle infants or young children before bathing and/or while wearing range clothes after shooting.
These are just some of the basics to live by. On one hand it is very simple to protect ourselves from lead, and it is not that dangerous. But at the same time a little carelessness goes a long way. I have dealt with many hazardous substances in my life, and lead is one of them. I have always been trained that the two largest dangers are inhalation (ventilation and particulate mask in some cases) and ingestion (contaminated hands to mouth, nose or handling food - don't open your pop and water bottles or cans with your dirty hands*)
* Note that I didn't say anything about adult beverages? That is because you don't mix alcohol and anything shooting STUPID!!!