My tmux config so far...

tmux.conf

set-option -g prefix C-a
unbind-key C-a
bind-key C-a send-prefix
set -g base-index 1
set-window-option -g pane-base-index 1
set-option -g renumber-windows on

# vi is good
setw -g mode-keys vi
bind-key -t vi-copy v begin-selection
bind-key -t vi-copy y copy-pipe "reattach-to-user-namespace pbcopy"
unbind -t vi-copy Enter
bind-key -t vi-copy Enter copy-pipe "reattach-to-user-namespace pbcopy"

# mouse behavior
setw -g mode-mouse on
set -g mouse-select-pane on
set -g mouse-resize-pane on
set -g mouse-select-window on

set-option -g default-terminal screen-256color

bind-key : command-prompt
bind-key r refresh-client
bind-key L clear-history

bind-key space next-window
bind-key bspace previous-window
bind-key enter next-layout

# use vim-like keys for splits and windows
bind-key v split-window -h
bind-key s split-window -v

# smart pane switching with awareness of vim splits
bind -n C-h run "(tmux display-message -p '#{pane_current_command}' | grep -iqE '(^|\/)vim$' && tmux send-keys C-h) || tmux select-pane -L"
bind -n C-j run "(tmux display-message -p '#{pane_current_command}' | grep -iqE '(^|\/)vim$' && tmux send-keys C-j) || tmux select-pane -D"
bind -n C-k run "(tmux display-message -p '#{pane_current_command}' | grep -iqE '(^|\/)vim$' && tmux send-keys C-k) || tmux select-pane -U"
bind -n C-l run "(tmux display-message -p '#{pane_current_command}' | grep -iqE '(^|\/)vim$' && tmux send-keys C-l) || tmux select-pane -R"
bind -n C-\ run "(tmux display-message -p '#{pane_current_command}' | grep -iqE '(^|\/)vim$' && tmux send-keys 'C-\\') || tmux select-pane -l"
bind C-l send-keys 'C-l'

bind-key C-o rotate-window

bind-key + select-layout main-horizontal
bind-key = select-layout main-vertical
set-window-option -g other-pane-height 25
set-window-option -g other-pane-width 80

bind-key a last-pane
bind-key q display-panes
bind-key c new-window
bind-key t next-window
bind-key T previous-window

bind-key [ copy-mode
bind-key ] paste-buffer

setw -g display-panes-time 1500
set-option -g status-right '%l:%M%p'

# Set window notifications
setw -g monitor-activity on
set -g visual-activity on

# Allow the arrow key to be used immediately after changing windows
set-option -g repeat-time 0

# Allow arrows to navigate splits
bind-key Up select-pane -U
bind-key Down select-pane -D
bind-key Left select-pane -L
bind-key Right select-pane -R

set -g status-bg colour27
set-window-option -g status-left " #S "
set-window-option -g status-left-fg colour232
set-window-option -g status-left-bg white

set-window-option -g status-right " %H:%M %d-%b-%y "
set-window-option -g status-right-fg colour232
set-window-option -g status-right-bg white

set-window-option -g window-status-format " #I: #W "

set-window-option -g window-status-fg colour232
set-window-option -g window-status-current-format " #I: #W "
set-window-option -g window-status-current-fg colour232
set-window-option -g window-status-current-bg white
set-window-option -g window-status-activity-attr none
set-window-option -g window-status-activity-fg colour226
set-window-option -g window-status-bell-attr none
set-window-option -g window-status-bell-fg red
set-window-option -g window-status-content-attr none
set-window-option -g window-status-content-fg cyan