To the people who gave all the good tips:
First of all thank you for your cooperation.
Second, I have seen all your comments and decided to put only a few here.

 

To the readers
babogurl  on May 29, 2013 12:55:47 says: x
Well, basically, I type out the summary of every single chapter of the few ongoing stories first, and then after that, I spend a few hours on one chapter, then another, then another. Then, I will do some checking on every of them. But basically, sometimes when I am busy, I will give my stories a number and use Random Number Generator and then the number that comes up of the story, I will update that more often. (:

dream_keeper88  on May 29, 2013 13:14:41 says: 
I have priority fics. I update them first. And I try to make writing a habit.

chocolate101  on May 29, 2013 18:36:52 says: x
I have a blogpost where I asked a simlair question. :D
You can find a lot of good answers in this blogpost. 
To The People Who Update Regularly.

To read all of the answers click here: How can you plan time when you have many ongoing stories?