What would you say if your customers are able to resolve their own questions tasks through their own account in your customer's portal by them-self directly ?
Why would they do that? Lets say they'll find answer or a fix by them-self and there is no need to get a reply from your operators anymore. Many time your operators spent couple of minutes/hours with some task (task read, issue investigation, finding out that everything works, no action needed - just a reply to customer about where's the problem etc.) which is not necessary to answer/fix. Customer can simply hit a "Resolve" button through his account and save time for both sides.
How to do that? Go into Customer portal configuration in your LiveAgent desk > Settings > Design > Custom CSS and add following line into the code
#my_ticket_resolveButton {display:inline-block;}
And click Save