If you have a virtual assistant or clients that you don't get to meet face to face, which is mostly the case with people with home businesses, WebWorkerDaily enumerated 10 neat communication methods or tools that you can use:

1. E-mail
2. Phone
3. Text Chat
4. VOip
5. Web Conferencing
6. Document Collaboration
7. Group Online Document Sharing
8. Wiki
9. Shared Calendars
10. Message Forums

Amongst these communication tools, one that's gaining more traction as the days go by is group online document sharing.

According, to WebWorkerDaily,

it is a repository-based collaboration. Keep the files you're editing in one place, and keep track of the versions so you know what the latest edits are. Koral is rolling out their document collaboration service aimed at small teams that appears very promising so far, free for basic use. Koral uses AJAX for a beautiful web interface, and such features as RSS feeds and a desktop dropbox to make sure files are in sync across users. HyperOffice, WebOffice and Joyent are other options with varying price tags. Windows users might like live-documents.com which doesn't actually upload the file to a central server. Instead, collaborative information is stored within the file itself on the users' computer.

Sharepoint and some Web 2.0 sites that offer this type of functionality are getting more popular because it facilitates monitoring of project phases and accomplishment progress.