Why should I meditate?

I did my first official course for learning meditation when I was in 7th standard (I guess). That was part of Children Siddha Samadhi Yoga. After that I did RCRT (Rapid comprehensive review technique) in std 9. I do not remember much experiences at the time of CSSY, but I remember during RCRT me and few friends of mine (Jashan Parekh and others I don't remember) we used to kill flies when others used to meditate.
Afterwards I tried meditation many a times, but most of the times whenever I started with very high aims like I want to see God and all... I could not continue for more than 10 days (not very sure about number of days).

Now today I decided to start meditation again but this time I am sure that I will continue it for long time.

Earlier I used to try meditation, but really speaking - even for CSSY and RCRT teachers used to expect a lot from us (I do not blame teachers - I know most of the teachers were good). The problem was they used to expect that when they say meditate for 10 mins we will meditate like Buddha. Come on, I think even it was not possible for them. So we used to do time pass, because if I go and ask for help general reply of teacher will be "concentrate!!... others can do it why can't you?". Now since I can not see 100s or 200s Buddhas around me on today's date. I am confident now that others though did not complained, they were also waiting for that 10 min time to finish.

After that when I became somewhat old (20-25) I tried meditation mostly to solve problems and to see God. Most of the times my problems were solved and I think I had chance to talk to God. I could not continue again because once the problem is solved I used to forget meditation (you know I am very busy ;))

So why I am writing this and why do I want to start it again?
I thought about it scientifically. Let me give few analogies to explain.
1. In fluid mechanics I learned that steady flow and turbulent flow. Similarly I think our mind gets 100s or 1000s or sometimes 1000000 (basically very large number) of thoughts every moment (turbulent behavior) and we try to go beyond many of them at a time. In turbulent flow of fluid, fluid particle is acted upon by many random direction forces. The flow as such has undermined direction. Now if I meditate I try to bring my thoughts in my control (though the dictionary meaning of meditation may not mean it - I am writing my ideas). So making my thoughts flow like a steady flow - direction of thought can be in control.
E.g. Let's take example of solving some algorithm, if I could tell/ direct my mind to think about nothing else but only that algorithm then I could get the better result.
2. In thermodynamics I learned that entropy (measure of inefficiency) is the reason for inefficiency. Again this entropy comes because of randomness. If I consider my mind as a machine who's output is thoughts then when I meditate I reduce the randomness in mind, so mind works efficiently.

I think this time I have good scientific reason behind meditation. I am hopeful that I will continue meditation 2 times a day, at least for next 30-60 days. I promise here that I won't take lunch if I do not meditate in the morning and I won't take dinner if I don't meditate in the evening. This condition is just for 45 days. After 45 days I don't know but at least update the results here in comments.

How should I meditate -
1. Focus your mind on anything you want. It could be 'C++'. It could be 'Project tasks'. It could be 'plan for next day'. It could be 'social topic'. Sit for 10mins without loosing focus from this topic/ subject.
2. In the evening I should meditate about what do I did today. Was there possibility for improvement? What are my plans for tomorrow.
3. In the morning I should meditate about what all things I want to do today? How can I make my today better than past?

Cheers!!
Ashish