How can I open an overfilled drawer?
Try to slide something flat in that is the width of the drawer. I've used a plastic flexible cutting board for this purpose before. Slide it open that 1/4 inch, and try to get the flat sheet to ride over whatever is jamming the drawer--you may have to nearly close the drawer with the sheet in place to get it up and over.

Then try to pull open the drawer and sheet at the same time, or leaving the sheet in place--whichever works.