Arrive early: Expect a waiting room sometimes, and wsit for the facilitator to let you in. It is as important in a virtual meeting to be punctual as in a real-world meeting. Allow facilitators to start on time by logging in a few minutes before time.
Limit background noise: Choose a place for your workstation that free of background noise, such as vehicles, crowd, machines, or animals sounds. Some tools will also allow you to set your software to filter background noise that is unavoidable. Keep your microphone on mute, as much as possible, if you still cannot avoid some noise.
Identify yourself: Log in with your real name so that you are clearly identified. If the meeting is only over phone call, call out your name as soon as you log in.
Dress appropriately: If you are going to be on camera, dress formally, in business attire.
No food allowed: Do not bring food to the meeting, unless it is a planned meeting over lunch. Water, coffee, and tea, and other such beverages are acceptable in most cases.
Leave the keyboard alone: Do not keep fiddling with the keyboard and be distracted. Your full attention is needed at the meeting.
Avoid multitasking: Even if he meeting is long, don't be tempted to work on unrelated tasks. Your limited participation will make the meeting less productive.
Speak clearly: Be aware that virtual meetings may have lag or the clarity of audio may be less than desired. Speak clearly and slow down the pace a bit. Repeat some very important points. Stress and pause on very important terms to ensure they are clearly heard.