i definitely slacked off my senior year... luckily for me, i had an internship 20 hours per week (which i couldn't really slack there) and my senior paper and that was it. however, i probably should have had the paper done by march, and didn't finish it until (literally!) the last possible second in the last week in april. i've taken this year off to work, and i am SO glad i did! it's given me so much time to prepare applications, study for the GRE, not to mention the days off that I've needed for interviews. (i work in a school so it's pretty flexible)...
i can't imagine applying to grad school during my senior year... you guys must be pulling your hair out!