Need some more details like how many days you have,what are the things you are looking forward to.
Here are few things:
Triund Trek is must.Leave early.
Dharamkot : Tushita Center for meditation courses.
Bhagsu waterfalls: Try Bhagsu cake.Shiva cafe.
Dalai Lama sessions if you are lucky.
Gallu waterfalls for sunrise views.
Kareri Lake trek.
Places like Bir,Dalhousie are not very far from Mcleodganj.
If you have 5k in your pocket that will enough to stroll around Mcleodganj. Here are 5 things you should must do:-
1. Visit Ileteratti Cafe
2. Bhagsunag Falls
3. Triund trek
4. Stroll around in Mcleodganj Main Square
5. Visit Buddhist Monasteries