First of all... CONGRATULATIONS! You now have your Licence to Learn.
As for what to do now, I can recommend doing a tailwheel conversion, as it will help to increase your experience of different types, teach you what your feet are
actually for
, and it will keep you interested.
The newly-qualified PPL's worst enemies are Boredom and Complacency, so whatever you do, try to make it interesting and try to make sure that you're always doing something to keep your brain active. I found that planning local trips as mini Navex's was quite useful, and if you're taking friends or family up, ask them a few days beforehand whether there's anything local that they'd like to see, that way you can sit and plan the route with them, makes them feel a bit more involved and also concentrates your mind a bit.
Good luck.