How long do you think you'd survive in the wilderness? What 3 items would you bring?

I would bring warm clothes, a good lighter that will work for a while and a knife.

The clothes would be necessary to survive the day and night if it would be cold.
The lighter could be used to make a fire and keep me warm, cook food, kill bacterias in water, etc.
The knife would be nice for getting food, building a shelter, etc.