aThere is more to Mount Abu than relaxing and enjoying the city/lake. What extra can one pursue to make the trip memorable and exciting:
1. Must hire a bike (preferably Avenger) for entire trip.
2. Mountain-biking to the top of Guru Shikhar early in the morning
3. Trekking at various hill points.
4. Venture in the wild (forest trekking)
5. Take a rented hookah (from market near Hotel Maharaja) to Jaipur House for an awesome night with a lake-view front.