Yo!
So, I was kinda free now and
ai_star requested me to make this tutorial. Urm, this is my 1st photoshop tutorial so forgive me if there's any mistake.
Title: Picture Edit (orz I just named it)
Level: Intermediate
Photoshop: CS5 (but I think it works with other version too)
How to make from this;

to this;

Before I start anything, I just want to remind you that there are a lot of great tutorials out there. Just explore and try to apply them with this tutorial. It could be fun and the result will be more satisfying;) Okay, anyway...
1) choose your picture, resized them, clean them according to your preference.
2) duplicate the picture
3) on the duplicated picture, set to 'screen' and the opacity is up to you. If the picture is already bright, set it somewhere around 10-50%, if it's dark, set to 60-100%.
4) merge both pictures. which means on your LAYERS pallet now, must have only one picture.
5) duplicate the picture again.
6) on the duplicated picture, set to soft light, the opacity is advisable to be same as the one you set 'screen' just now.
7) create new layer on top of the very 1st layer (transparent layer)
8) choose darkish yellow colour (#EFE100) and fill it on the transparent layer.
9) set to 'exclusive'. it will become like this but don't worry, we will fix that XD

set the opacity between 10-20% and you will get this.

Better than the original picture. But I wanna enhance the color more so I will just play around with the color. Read more.
10) go to Layer -> New Adjustment Layer -> Selective Color. don't change anything except cyan, set to -60.
11) again go to Layer -> New Adjustment Layer -> Hue/Saturation
set the following as;
reds: saturation +12
yellows: saturation +6
greens: saturation +50
cyans: saturation +33
blues: saturation +70
12) on your LAYERS pallet, click the very first picture/1st layer/original picture.
13) click Filter -> Sharpen -> Sharpen
14) click Edit -> Fade Sharpen -> set to soft light -> 30%
There you go!
This is my result ;)

You can check more of my edits like this on my tumblr
here (kinda promote my tumblr lol XD)
Have fun playing around ♥
If you have any problems or question, feel free to PM me :)