Two all in rules of thumb broken

Last night, in the first tournament I entered, I hit the felt when I broke not one but two all in rules of thumb. Here are the rules I broke, to my detriment:

1. never go all in on a draw
2. never go all in when more than one opponent has gone all in before you

I was dealt the ace and seven of spades, and the flop came 3s 5c 8s. It's very tempting to go all in in this situation, but also very risky. When two players have already gone all in before you, it's downright suicidal. Live and learn!

buy_in entry_fee num_players num_hands place winnings

 50000       800           6        14     6        0
 50000       800           6        30     4        0

delta: $-101,600
tournament balance: $1,524,290
balance: $6,655,021