Filing/ Organizing Question

Hi people…

TGIF! I had to get that out. Now, I’m curious as to how different people keep their files and information organized. Things can definitely get out of hand pretty quickly without a system in place. How are you able to intelligently hold a followup convo with a potential buyer or seller if you don’t have acess to their “file” like if you are on the road or away from the desk? ???
Are you using Act! or other contact software? File Cabinet? Notecards?

Any feedback would be great…

I keep all data in my laptop - and this thing goes with me everywhere I go.

I think I need to get a palm type handheld, but then it still leaves to thought of what software to store the information in so I can pull it out to my desktop and then try to transfer it to some larger more productive program.