My .bash_profile/.bashrc setup.

.bash_profile

# Google:
export PATH=${PATH}:$HOME/gsutil

# http://unix.stackexchange.com/questions/1288/preserve-bash-history-in-multiple-terminal-windows
# http://superuser.com/questions/137438/how-to-unlimited-bash-shell-history
# https://www.kernel.org/doc/man-pages/online/pages/man3/strftime.3.html
export HISTCONTROL=ignoredups:erasedups  # no duplicate entries
export HISTSIZE=100000                   # big big history
export HISTFILESIZE=100000               # big big history
export HISTTIMEFORMAT="%a %h %d - %r "   # timestamps
shopt -s histappend                      # append to history, don't overwrite it

# Save and reload the history after each command finishes
export PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND"

.bashrc

# Python virtual environments:
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_VIRTUALENV_ARGS='--no-site-packages'
export PIP_VIRTUALENV_BASE=$WORKON_HOME
export PIP_RESPECT_VIRTUALENV=true
if [[ -r /usr/local/bin/virtualenvwrapper.sh ]]; then
    source /usr/local/bin/virtualenvwrapper.sh
else
    echo "WARNING: Can't find virtualenvwrapper.sh"
fi