Speeding fines can be extra costly in Bern depending on where the offence took place and how far over the speed limit the driver was. The fines are considerably higher in cities rather then on highways or the Autobahn, but you should still be careful when driving around!
The possession of drugs can incur heavy fines and prison sentences in Switzerland. The charge depends on the amount of drugs in your possession, but you should know that Switzerland take drug crime very seriously.
In busy areas, take the usual precautions and watch for pickpockets and petty thieves. Keep your belongings safe, secure and with your person at all times.