Maybe you're a Dublin, Kerry or Kilkenny fan and you hold on to your programmes because it reminds you of joyous days in Croke Park.
Or - like me - maybe you're a Mayo fan and you use the match programme at the end of each final as torn up tissue papers for tears.
Regardless, heading into Croke Park or any stadium for that matter for a GAA match - whether it's the League or the Final - you need to get yourself a match programme.
If you don't, what are you going to do before the game and at half-time? Think some more about the game that you haven't stopped thinking for two weeks?
And, who knows, it could be worth a ball of money in a few years time.
Take this GAA Programme from the 1913 All-Ireland Senior Hurling Final Kilkenny and Tipperary.
Kilkenny People is reporting that it made €2,200 at The Fonsie Mealy Auctioneers auction in the Ormonde Hotel, Kilkenny which was well above the estimate of €1,500.
The publication states that "it raises the possibility that other rare match day programmes are tucked away in old boxes or in attics around the city and county."
So it's definitely worth having a look in the attic for - and who knows, it might not even have to be that old, just significant.
Think teams who won their first All-Ireland in years/ever or teams that have won various titles year after year.
Take The Dubs recent three-in-a-row for example or the famous Kerry teams of the 70s and 80s or the Galway football teams of the 60s or the noughties Kilkenny hurling teams.
Or, it could be something as triumphant as Armagh and Tyrone's historic wins in the early noughties or Donegal's in 2012 or even Galway ending their almost 30-year famine in the hurling this year.
All of these are examples of programmes that could be worth a fortune in a few years, or even now.
What was so special about the programme above? Well, it was the first All-Ireland in Hurling to have the number of people playing reduced down to 15 a-side and Kilkenny also claimed a famous three-in-a-row, which is good because Kilkenny never really win any silverware in hurling in modern times...
So, before you think about throwing out that programme, just remember that it could bring you some easy moola in years to come.
And, if GAA isn't your thing, maybe you have one, two or maybe all of these 20 books on your shelves which are worth A LOT of money now.
Get searching, folks.