It is not enough. There are many companies out there who won’t even consider your 60 years of Cowboys thanks for the memories shirt. My suggestion would be that you leave every extra curricular activity you are pursuing (eating, sleeping and drinking water) and focus only on your studies. Try studying while in the toilet, and while brushing your teeth, it makes you a multi-tasker. Also try studying while you are walking from hostel to the classroom, why waste the time.
Buy this shirt: 60 years of Cowboys thanks for the memories shirt