With many tools for connecting you to your office, freely available. The choice seems vast but really there are a few front runners for you to consider.
LogmeIn has been very popular and I have seen this commonly used. TeamVeiwer is another free tool that is popular also VNC and GoToMyPC.
The trouble with all of these tools is that you take over the screen and work away. When you are not in your office anyone who is can happily watch you work.