How to make a reminder on the lock screen I would like to create a reminder on the lock screen so I can see it everytime I tried to use my mobile.

How can I do that?
Since you have Jelly Bean; how about a lock-screen widget? They're very useful and there are tons of them. 

Note by default Lock Screen Widgets are disabled, go to the Settings app on your device, select Security and look for the "Enable Widgets" option

You could use Google Keep  as an example:


(source: ampercent.com)  

I use  Dash Clock widget on my lock screen and homescreen! It's a wonderful, simple widget. The advantage is you can add loads of extensions, for example:  Dash Clock NOTES  which sounds exactly right for what you need! 

Here's an example:

http://cdn7.staztic.com/app/a/2260/2260711/dashclock-notes-extension-903772-0-s-307x512.jpg

There are numerous notebook style applications, and I, obviously, cannot provide an exhaustive list. Why not shop around (many are free) and ensure they have a lock-screen widget option?!