Having the button for "save for later" is good...adding one to the top would be GREAT.
Here is an IM I just received from one of my colleagues...
Hi. Do you ever get the opportunity to give workfront suggestions for changes? If they could have a save button the time sheet at the top of the page (not just at the bottom of the list), that would be great. It seems like there is plenty of room and it would save A LOT of scrolling.