This is dire situation for India. The terrorists showing too much aggravation and willingness to attack on the face. This is something very new which hasn't been seen yet in India.
The terrorists want to threaten you, challenge you on your face and then want to hog the lime light for long durations, rather than a single suicide bomb blast. In this, create a hold up situation and then try to hold ground for longer durations.
I think, there are many things India would need to do to face these new challenges.
1) As an individual, I always oppose the US foreign policy, especially the last few years when they have been the reason to have thousands and thousands of civilians killed in the middle east region. Still, as a country, they have been able to resist any future terror attacks and did give the terrorists night mares after having bombed US cities. As a country, US has been able to instill confidence in their countrymen that they are capable of handling any such attacks and can curb, handle them very efficiently.
So, now, India also will have to take this positive stance for any kind of terror activities. Our politicians shall have to stand up to take decisions and own them. Indira Gandhi did the operation BlueStar, she faced the aftermath of it, but still stood ground, she owned it. She had the grit and confidence to go ahead with it. I am not saying it is justified or not, but our netaji's need to have such confidence to take decisions, which is already endangered.
2) The police force currently is working on the pace of electricity department or any other for that case. That is, there is no difference between a person working in police dept or and electricity or water supply deptt.
We need to create a dedicated force to combat terrorism. Which should be equipped with latest gadgets, equipments and trained in combating terrorism. They should be trained in war fare activities and are governed by dedicated individuals. We need to have a different way of functioning.
3) The media should have some regulations. In this case we saw, the ATS chief is wearing the helmet, the bullet proof jacket, talking on the cellphone live on the news channels. The attackers must be watching everything sitting inside and it can fairly be imagined that this might have helped them.