I think ... a lot. And like many things, the more you do it, the more likely you are to mess up. So I mess up a lot. For me, messing up is when I overthink stuff.

To show you a little bit of how much I think about frivolous things, heres an example of me getting food at my schools dining hall (including my thought process in italics):

Somebody looks at me.

yo why did he just look at me wtf??
is my hair messed up?
do they not like my outfit?
is it weird for me to be getting a burger at 1pm?
its not even dinner...or lunch.
should I not be eating right now????

I accidentally make eye contact with a stranger

I'm so cooked.
so so cooked.
they are going to think I was staring at them.
they have no idea how long I was looking in their direction before they looked over.

I sit down. I got a cup of ketchup for my burger. I didn't get fries. How will I make this work?

No way in hell am I standing up again to get a knife (I like to minimize walking so I can minimize tripping. I'm quite clumsy).
How do I even get this ketchup onto my burger?
I need this ketchup, what is a burger without ketchup?!?

I am a patient guy, so I take the most logical option; I open my burger, open my ketchup, and put it face down onto the burger. I sit there, watching the ketchup slowly fall onto the burger, feeling very satisfied with my intellect.

I hope nobody saw that shit.