When carrying ridiculous quantities of stuff the short distance from your car to the office, take an extra moment to use the shoulder strap on your laptop case. If you don't, you will trip over said shoulder strap, fracture your ankle on your wheel-arch, smash your laptop on the concrete and - because you are carrying too many things and can't put your arms out - land flat on your face in front of eight builders, breaking a tooth and permanently damaging your ego.