I started travelling from Kolkata to Shillong Via Guwahati. I reached Guwahati at 8 a.m by train and from there I took Bus to reach Shillong. It took 3 hours to get there. Buses are frequently available from outside Guwahati station & fare is 140 rs each. Shuttle taxies are also available, the cost is 170 rs each or you can hire privet taxies that will charge more or less 1000 rs, but you have to bargain.
After getting fresh I did local sightseeing in shillong city, like- Lady Hydri Park, Cathedral Church (Laitumkharh), Marba Hub and local souvenir shops.