Another anology...

CPU time or CPU usage is the amount of time a computer program uses in processing central processing unit (CPU) instructions, as opposed for example to waiting for input/output operations. The CPU time is often measured in clock ticks or in percentage of the capacity. It is used as a point of comparison for CPU usage of a program. Each program tries to get as much processing time possible to get it's work done and free itself from it's responsibilities. Then there are the evil programs which try to grab all the processing power and slow down your system. At any instant of time if one sits down and takes a careful look, he/she will realise that there are a bunch of unnecessary programs running in the back ground slowing down the system. If you carefully analyze most of these processes are not required for sustenance of the system and most of the work can be done without them as well.
Still they are run in the background, just hoping to be used someday, by some random thread or process. I have been doing a lot of CPU load testing down at my company in PS, and each thing you add to your OS slows you down, each extra unused module/ driver slows it down. A good system always decides what is best for itself and then prioritises as required.

Now people don't beat me up for my yet another weird analogy, I hope that you will be able to share my insight in to this little idea. Everything we do in life makes us think (well not dope and hash coz that is supposed to not let you think), it occupies a small part of our brain , it may be running in our mind all day long or in sudden bursts. Some of these thoughts which keep you occupied are just pure evil , coz they pull you down. Some of these can be

Guilt : Oh I should have give my best shot, why did I hold back. I shouldn't have said that, jack ass I am.

Hate: How could he say/do something like that, bloody %&^%*()^)&(_*_

Overburden : I need to get a six pack and do well in exams, get placed, get a girl, be a good person, help the poor, go to temple.

Worry : Will I get a good university? Will I get placed? Will my paper get published? Will she say YES ? Is mess gonna suck today as well?

Then there are the good thoughts like :

Eagerness : When you takes pains and plan something for a friend.

Satisfaction : Your 2000 line code finally is debugged after countless hours of labour and it gives a small cute little output as expected and your face is lit all day long. Mess worker let you have an extra sweet at lunch today.

The idea here is that there are some nasty things in life about which nothing can be done either because it's too late or it isn't within your scope to begin with. So what's the point worrying about them. If something is not in your hand that prolly praying will help but worrying about it will certainly not help and moreover it will occupy your mind all the time.
If there is guilt because of a mistake; then learn from it ; move on and forget it. Hate LOL, it's the funniest thing I have come across.
Coz the it ruins the person who hates and hated is happily enjoying his/her life.
Here you are hating another person, and spoiling you own mood and the other person is simply enjoying his/her life, prolly getting laid or having the time of their lives.
Don't pull yourself down by adding extra unnecessary responsibilities, sit-down, decide wat you want and then give a full shot at it, no holding back then.

Bottom line
_______________ hehehe

Don't worry, it will only make u mad and probably degrade your processing power,
instead prioritize and enjoy.

PS: No Trainer kit here. lemme know if u can fit a kit here as well