Reach Manali through Delhi or Chandigarh by bus early morning, preferably by 10 am. Chose a multi axle bus, as it lessens the jerks when you get on the hilly areas (approx 1000 to 1400 bucks per person). Do keep medicine which prevents you from puking. Generally all the buses for manali leave for Majnu Ka Tila in delhi.
After you reach the bus stand in manali, hire a cab to your pre-booked hotel (approx 150 to 200 bucks if you take one from the bus stand) . You can enquire your hotel if they provide a pick up service as many do. There are alot of options for hotels, from budget friendly to luxurious ones. You can chose depending upon your budget. If you are looking for a view from your hotel then choose one away from mall road and preferably in Aleo, Old Manali or maybe even further. If you want near to shopping hub and eateries then you may chose in Mall road. Always read the reviews before booking your hotel.
After reaching hotel, get freshen up and leave to visit nearby sites like Club house (25 rs entry per person) , Hadimba Temple, Van vihar(50 rs per person), Buddhist Monastery, Vashisht temple. You may or may not hire a cab for your trips to all the places you will be traveling which will cost you around 3000 to 5000 bucks for the complete 3 to 4 days trip. Personally, Van Vihar had nothing much to offer. You can do few activities in club house like Zip lining (250 per person) , Burma bridge (100 per person) , zorbing, etc. You can click amazing pictures with beautiful background of the green forest and the river and the snow clad mountain. They have snacks to offer at club house too.
Hadimba Temple has a beautiful and serene surrounding. You can get dressed in the local Himachal attire and get pictures clicked (50 rs per person). They also let you get clicked over a yak and with mountain rabbit.
Later in evening you can visit the Mall road and buy souvenirs for family and friends. They have delicious eateries all around especially the momos.
Then you can get back to your hotel and relax for the night as it has been a busy day.
Next day after breakfast leave for solang valley early by 8 am as the traffic increases as the day gets ahead. Bring water bottle with you. Hire dress and boots for the snow ( 300 perhead) from the shops on the way.. They can also provide you with skiing offers(500 per head). You get to enjoy the beautiful scenery with snow clad mountains on the way. You will meet your guide at the solang valley. He will take you to the skiing point. Its an experience worth having. There are other activities on the site too. Don't try the paragliding there as they don't have permit license and also its better in Kullu. Enjoy the snow. Take as many pics as you can as its once in a lifetime opportunity. They have various food stalls there offering Maggi, omelette. Have fun all day there. On your way back you can try the longest zip line, 700 metres. Return back to your hotel as it will be an exhausting fun day. Take rest.
Next day again start early. After breakfast leave for Kullu, kasol and Manikaran by 9 am. On your way, in Kullu, you can do the paragliding (approx 2000 per head). Probably one of the best adventure sports one can try and feel the adrenaline rush. You can also get your video made (500 per head). After that try the River rafting(1500 rs per couple) , again an adventure you won't regret with your video made for the journey. The people who handle these adventure sports are very well trained, government certified, and with years of experience. Its a must try for a lifetime memory.
Once done with these, leave for Manikaran by your vehicle. You get to visit Kasol on your way. The road journey will be the highlight of your trip with Parvati river flowing between the greenery and mountain. You can stop for pictures on the way. The whole scenery will make you fall in love with the nature.
Then proceed to Manikaran. Its a Gurudwara which has hot water spring with parvati river flowing by the side and snow clad mountain in the front. Enjoy the spiritual connection. Also have the delicious langar they provide there. It's considered very important in the sikh religion and for obvious reasons.
Then you can proceed back to your hostel. On your way visit the vaishno mata devi mandir. Get to tour hotel and take rest.
Today is the last day of your trip with a visit to NAGGAR Castle. Its a wooden structure with mesmerizing view from the top of mountain. You may leave by 11 am. On your way you can see the apple orchid. If it's August, you can see them bearing apples. Naggar Castle has amazingly calm surrounding. Lots of famous movies have been shot here like JAB WE MET, SANAM, etc. Take lots of pictures. If you have interest in art and museums you can proceed to ROERICH museum above the Naggar Castle. Near the museum, there are two aunties with food stalls offering momos, Parathas etc at very cheap rates and probably the most delicious momos you ever had.
Almost everything relevant to manali is done. Procced to your hotel. By evening you can catch your bus to Delhi or chandigarh.