Pen something without the need for people to comment or give you feedback on it; learn to play a new musical instrument or just grab a book from the shelf before reading up a review about it first.
Go on a road trip with your girlfriend, or kids or your mom, or invite your college buddies to go camping, fishing or abseiling with you. Be adventurous and try doing something for yourself that does not involve signing up or logging into a site.
Leave your electronics behind or if you can’t get out of the house long enough for a trip, disable your Wi-Fi and reconnect with yourself via meditation, a bubble bath or just by whipping up a nice salad for yourself.