Here's some good rules:
1). Don't be retarted.
2). Don't shove it in the pant's waist.
3). Don't buy untrusted "Sat. Night Specials".
4). Don't shoot yourself.
5). No hairpin triggers.
6). Never place finger on trigger, unless you're firing it(that moment).
7). Never leave safety off till ready to fire.
8). Don't pour soda on it.
9). Assume it's always loaded; otherwise you're about to feel hot lead.
10). Trouble starts when... you're retarded.