The more professional you are, the more credibility your plan will have. Include data such as productivity improvement statistics and a list of firms with telecommuting programs. Keep a log of what you do at work for several weeks. Divide the tasks into those that could be done more efficiently at home and those better performed at the office. The longer the home column, the more weight your plan will carry.
Equipment is a key issue.
If you already have a PC and modem at home, you're ahead of the game. If you don't, it's up to you and your company to hash out who writes the check. Invest in an adjustable chair and a desk with a sliding keyboard tray. Be clear about how you can be contacted when out of the office. E-mail your home office number to colleagues, and put it on a note attached to your office PC monitor.