You have 4 choices:
1) Exercise early -- You didn't say if you have a call or a put. Exercise call = buy underlying at the strike price. Exercise put = sell underlying at the strike price (if you don't own them, you will be short the underlying).
2) Expire -- Wait until after expiration date and they will be worthless. Your broker will likely automatically exercise at expiration if they are ITM.
3) Sell the option -- This is usually what you should do because the option will have extrinsic value left. If you exercise early, you lose the extrinsic value. As a result, you would be better off selling the option and then buying/selling the underlying instead of exercising unless for example, there's a dividend greater than the extrinsic value. You should sell the option if you don't want to buy or sell the underlying.
4) Wait -- Wait and see if the option goes further ITM if you intend to sell it and want to try to make more. Of course it could also go OTM if you wait.