Traders: Be Careful What You Eat for Lunch

Photos and smells of delicious food can cause people to manage their money poorly:

…another experiment used a cookie-scented candle to further gauge whether appetitive stimulus affects consumer behavior. Female study participants in a room with a hidden chocolate-chip cookie scented candle were much more likely to make an unplanned purchase of a new sweater — even when told they were on a tight budget — than those randomly assigned to a room with a hidden unscented candle (67 percent vs. 17 percent).

Just the smells of your lunch may cause you to stray from your trading plan.
Also, I would be careful about trading in the presence of attractive women:

Similarly, the presence of an attractive woman in the trading room might propel an investor to choose the investment option providing smaller but sooner rewards.

When I was in Las Vegas the casinos all were scented and there were plenty of attractive women.