Best Practice One
Turn off your video camera. Generally participants should be focused on the application sharing window and not video. Turning off the video feed will significantly decrease the amount of data being sent by the moderator and received by the participant.
Best Practice Two
Ensure good internet connectivity. Application Sharing uses a lot of bandwidth. Be sure you have a robust Internet connection, either a fast LAN connection or excellent Wi-Fi signal strength are key. However, if at all possible plugging in directly to the router with an ethernet cable is preferable to using Wi-Fi.
Best Practice Three
Sharing the entire desktop uses the most bandwidth, due to the larger screen area being shared. If possible choose to application share only a particular application, your web browser for example. Then reduce the size of the application's window to the smallest size that is still practical for the presentation.
Please note, some applications simply display better when you share them in full desktop mode rather than sharing a specific application. For instance, menus that appear when right-clicking within an application may not appear and sharing individual Microsoft Office applications can be problematic. PowerPoint slides do not appear to advance for participants in the session. Participants cannot see edits made to Microsoft Word documents or Excel workbooks. If an application fails to display properly when sharing a single application, try switching to full desktop sharing.
Best Practice Four
The more motion and visual changes made in the application sharing window, the more bandwidth you will use. While seeing motion is part of what makes application sharing a wonderful tool, try to cut out any excessive motion that isn't needed for the class, for example "cute" animations.
Additionally, it is inadvisable to application share videos as no audio will be heard and the video may take up enough bandwidth to downgrade a participant so that they no longer see application sharing.
If you must share a video in Collaborate, please use these steps to share a Chrome tab: https://help.blackboard.com/Collaborate/Ultra/Moderator/Moderate_Sessions/Share_Content#share-audio-and-video_OTP-1
Best Practice Five
When switching between applications, ensure participants are able to see changes before continuing with the lecture. The more drastic the change the more data will need to be transmitted.