1. When designing your secret hide-out, insist that the architect does not include any ventilation shafts. Or if they are absolutely necessary, stipulate that their diameter is small enough to prevent anybody from crawling along them.
2. If you capture James Bond, ensure that your minions kill him immediately. Under no circumstances should you take him prisoner and then reveal your plans to him before placing him a killing-contraption that he will escape from.

paulo
7. Dressing all your staff in matching costumes make them easy to identify and renders them unable to shoot what they are aiming at.