My current settings for Slate

.slate

config defaultToCurrentScreen true
config nudgePercentOf screenSize
config resizePercentOf screenSize

# Shift + Command
bind up:shift;cmd    move screenSizeX/5;0 screenSizeX/5*3;screenSizeY
bind down:shift;cmd  push down bar-resize:screenSizeY
bind right:shift;cmd move screenSizeX-320;screenSizeY/2 300;screenSizeY/2
bind left:shift;cmd  move 20;screenSizeY/2 700;screenSizeY/2

# Compatibility to the orignal keyboard shortcut to Maximize menu item.
bind m:shift;cmd     push down bar-resize:screenSizeY

# Option + Command
bind right:alt;cmd nudge +10% +0
bind left:alt;cmd  nudge -10% +0
bind up:alt;cmd    nudge +0  -10%
bind down:alt;cmd  nudge +0  +10%

# Control + Option + Command
#bind right:ctrl;alt;cmd throw right
#bind left:ctrl;alt;cmd  throw left
#bind up:ctrl;alt;cmd    throw up
#bind down:ctrl;alt;cmd  throw down

#bind right:ctrl;alt;cmd  push right bar-resize:screenSizeX/2
#bind left:ctrl;alt;cmd   push left  bar-resize:screenSizeX/2