Photoshop more powerful! It's trying to control all the features is unrealistic (not to mention there are so many hidden features!), Then we might look great God who summed up the collection of the 120 PS skills, and occasionally look at, to make their design more powerful and more efficient !
1. Remove Hidden Layers
When we plotted with ps, we will continue to overlay many layers to achieve the effect we want, for efficiency, while there may be some layers will be used again, and did not at first time to remove it. So when we complete the design to save, find your PSD is a super large files! 1.2GB ...... you can not help but wonder, "I did not use any special effects ah? How files so big?" The simplest possibility is too large garbage layers friends (and a lot of high-definition images dragged into useless ). 
So, in general I would refuse to conduct a clean layers before saving the output. PSD files I have never been a big, basically less than 10MB (this is the reason because I GUI designer, graphic designer documents are usually larger, because the picture to meet the printing requirements) .... so my hard drive can be installed on a lot of other things! Similarly, fewer layers of garbage, open the file with ps time it will be much faster!
: Click on the Layers palette menu, delete hidden layers
▲ in this psd, you will find an unexpected addition to the layer selected, others are useless. delete! 
2. Change the sample size
when you're dealing with a very high resolution of wood / marble texture image, you will find that you want to get accurate color is very difficult. In this case, the best way is to change the sample size. Select the eyedropper tool, set the parameters in the upper left side of the options bar, on the "sample size" argument to make adjustments, generally speaking, the higher the resolution of the image, select the sample size is also higher. 
3. Lock Brush Preset
with "F5" shortcut can call the Brush Preset panel, parameters can be adjusted to add rich visual effects for the brush. And when we lock after a preset brushes, regardless of how you make changes to the selected brush, brush preset parameters previously set will not be changed. This is quite useful in the process we need to use a variety of brushes. Of course, if you do need to modify brush parameters, then back to the Brush Preset panel can be unlocked. 
4. Smooth line art
sometimes, you may put a bitmap line package into Photoshop, then we will find in the PS, the lines are not smooth, the edges appear jagged. To change this situation, we can add to them a little fuzzy, use Filter> Blur> Gaussian blur (radius 2-6). Then click Ctrl + L excellent transfer order, click on the black and white triangles and drag it to the middle, then we can note that the line will become smooth and sharp, jagged also gone. 
5. Kits (a more common tool may press the shortcut key [Shift] Add shortcut key selection)
Rectangular, elliptical marquee tool [M]
Move tool [V]
Lasso, polygonal lasso, magnetic lasso [L]
Magic Wand [W]
Crop tool [C]
slice tool slice select tool [K]
Airbrush tool [J]
Brush tool, Pencil tool [B]
Like skin seal, stamp pattern [S]
History Brush tool, art history brush [Y]
Like eraser, erase the background, like a magic eraser [E]
Gradient Tool, Paint Bucket tool [G]
Blur, sharpen, smudge tool [R]
Dodge, Burn, Sponge tool [O]
Path selection tool, the tool directly select [A]
Text Tool [T]
Pen, Freeform Pen [P]
Rectangular, rectangular with rounded edges, ellipse, polygon, a straight line {U}
WordPad, voice annotation [N]
Straw, color sampler, measurement tools [I]
Hand tool [H]
Zoom tool [Z]
The default foreground and background colors [D]
Switching foreground and background colors [X]
handover standard mode and fast mode mask [Q]
Standard screen mode, full screen mode with menu bar, full-screen mode [F]
Jump in ImageReady3.0 [Ctrl] + [Shift] + [M]
Use the move tool temporarily [Ctrl]
Temporary use of exhaustion tool [Alt]
Hand tool for temporary use [space]
Fast input tool options (currently the tool options panel at least one adjustable digital)
[0] to [9]
Brush cycle selection [[] or []]
Create a new gradient (in the "Gradient Editor") [Ctrl] + [N]