Ideal use of time???

These holidays are gettin on my nerves. From a personal POV i have wasted loads of time in the hols. Like how i am doin rite now. Bcos there has been no closure to the exams its always at the back of my mind and i have not been able to start anythin new. I think half my life has been whiled away doin nothin :-(. And tat really harps on me cos every second i waste now., i am never gonna get it back. Ever. Its gone with the wind. So i really wud like to make gud use of every sec.Many a times i have wondered wat does classify as not wastin time. Personally i feel time sud be spent

* improving ur skill set. ( this encompasses a wide range of things )
* meetin / talkin to ppl : old and new. ( here again im confused cos orkut/ y! /sms/partyin is technically meetin to ppl.. but i wunder if its a waste of time ?.. i guess too much of it is. )
* physical activities. ( as in sports, yoga, exercise etc. )

But wat is really needed is a good mixture of the above. Not excess of any one thing. But the irony is wen im real busy i wil look back with nostaliga at those days wen i had nothing to do!!. Now wen i have nothing to do im cribbin bout how i wud like to busy. So , i guesss im gonna jus leave it free and enjoy da moment. ;-)