A few tips, please note these are in no means sufficient tips to keep you safe. Such things are up to you!
- Water and a snack
- Tools to repair your bicycle
- Medications and small first aid kit that includes gauze and disinfectant/rinse.
- Extra clothing depending on weather
- Telling somebody where you went in case your phone has no signal
If you ever get lost, the best chance to get out is staying on the double-track. Do not continue travelling on the single-track, it is not signed, the forest is quite large and emergency services will have a very hard time finding you.