You can practice feeling life from the vantage point of someone else by reading a book or watching a movie that is told by an older person. What would they do today if they were in your shoes? Try acting as this person would if they could switch to your younger body.
Source: 4 Effective Practices For Gaining Perspective @ Possibility of Change
Image by Azoreg (Own work by uploader) [CC-BY-SA-3.0 or GFDL], via Wikimedia Commons