Clipit is started automatically already
Try Compton again

Following these options for performance and tear-free compositing:
http://ubuntuforums.org/showthread.php?t=2144468&p=12644745#post12644745
Save screenshots in a consistent location
Use SHELL variable instead of hard-coding
Store lxpanel and lxsession config
Add highlighting for CoffeeScript/eco
Open new windows in home dir

tmux 1.7 opens new panes and windows in the current working directory.
I like this for panes, but not for windows.