an irreversible process

It was long back when we had Chemistry laboratory and we would experiment with all the salts and chemicals.
It was great fun. Some of them tasted sour, some of them more sour.
So, for a second, I thought it would be good to conduct a simple experiment, to revive all those memories of lab reports, practical etc.
Thus started my experiment.

I set out with a slightly bigger aim - I should successfully complete the experiment and the experiment should be useful to someone in one or the other way.
So here was my aim - "to increase the entropy of the universe". Now that the aim is defined, I set out to gather the apparatus needed for the experiment.
I really missed the burettes, the conical flask, the catalyst solutions and most importantly the pipette, which helped me taste the sweet chemicals, for these were not useful in the experiment I wanted to conduct.
Procedure was quite simple. Thermodynamics says that the entropy of the universe can be increased by an irreversible process. So to carry out my experiment, I had to find an irreversible process. But the other part of the aim was a bit difficult. What kind of irreversible processes are helpful to others?
When you don't know what side effects a process can result in, its always dangerous to execute an irreversible process. It can do more harm than help.
Finally, after a great bit of thinking, I found an irreversible process. Yes, it was both harmless, not at least for others, and it is useful in a way.
Thanks to my Chemistry professor who once mentioned that this kind of processes are also helpful in some ways.
So one Sunday morning, I had a hair cut. Yes, the irreversible process was executed, though it was a temporary irreversible process.
Observation - Entropy of the universe increased. But I couldn't exactly measure by how much it has increased, owing to my poor knowledge of formulae and stuff.
Result - Experiment conducted and aim reached. Oh, I forgot to mention that this experiment of mine has provided some extra stuff to work on, to the alpha-keratin research community experimenting on the keratin content in human hair. So it was both helpful and also successful.