I'll specify: I'm thinking wild as subarctic taiga.

If I could have some means to light a fire and good knife, I don't think there would be much problems until weather would grow too cold. And maybe sometime after that, if I would know I must prepare for winter. Most hardest part would be being alone, but maybe I'd not go mad. Wild animals wouldn't be problem, if I would have fire. And there is so much of eatable plants in nature, and I would like to try hunting with sling...

Yeah, I'm mad already. As a little girl I wanted to be a caveman... :p