Research iPhone 8 Competitors
You should monitor the iPhone 8 rumor mill but don't let it blind you.
If you haven't done so already, now would be an excellent time to start researching the iPhone 8's competition which, again, might include an iPhone 7s.
You won't be able to get this research done in a day so start now. Read reviews, gather up intel on upcoming devices, and absorb as much knowledge as you can in the buildup to the iPhone 8 launch.
If you do, you'll be in a great position when it's time to buy.