The alarm clock is basic for our live. Without it, we never arrive at time at work.... this should be nice! But perhaps our boss will be angry...
The satellite dish is really important for comunication between all parts of the world.
The mobile phone is necessary because we need that other people phone us while we are in a mitting, in cinema, etc. and, in this way, we can bother other people. ;-)
The portable computer is important if we want do our english homeworks while we are travelling.