What can you do without Internet? You will not notice that until you spend couple of days without Internet. You will notice that you cannot do much with your computer without Internet. So what can you do during that time?
That would be the best time to relax and enjoy the things around you. During that time you can do some relaxation exercises such as meditation as there will not be much interruption. You will be able to use your mind power to get things done rather than get it done though Internet. That would be a great mind hack that you can do during a time you live without Internet and connection to the outer world.
You will miss lot of things and you will notice that you cannot do most of the things you did before. For me it was a hard time to live without Google. No need to mention that Google play a major role in every part of life and you can get all the information you need from cyber space. During such time you will not get any help from Google. First you have to get used to live with a emptiness.
Stop thinking about the things you cannot do. Make a list of things around you and you can do without Internet. You will be surprise how many things you can do without Internet. That list will make you feel better and reduce the emptiness in your mind. Even if you think you need Internet to complete a job I am sure you will have a alternative method for most of the things.
It will be the best time to organize your mp3, movies, documents and all the files you have. You can run a defragmenter, clean up the computer a bit. However, remember not to do major changes or deletions, because it might crash your computer and you will not be able to fix it or retrieve it for a while.
You can always refer to couple of good books if you have any. You can always go through what you have learnt and experienced and refresh the memories. These simple tasks will keep you busy during a time you do not have a Internet connection to join with rest of the world.