If you SSH between boxes regularly and want a little mental signpost, here's something for 256-colour terminals you might like that gives you colours to use in your prompt based on hostname.

.bash_profile

# ... insert this somewhere in your .bash_profile or .bashrc
if [ -f ~/.bash_prompt ]; then
    . ~/.bash_prompt
fi

.bash_prompt

# Host-specific calculation
LC_CTYPE=C
ASCII_TOTAL=0
for ((i=0; i<${#HOSTNAME}; i++)); do
  VAL=$(printf '%d' "'${HOSTNAME:$i:1}")
  ASCII_TOTAL=$(( ${ASCII_TOTAL}+${VAL} ))
done
ASCII_TOTAL=$(( ${ASCII_TOTAL} % 255 ))

if [ ${ASCII_TOTAL} = ${i} ]
then
  ASCII_TOTAL=199
fi

COL_HOST_BG=$(tput setab ${ASCII_TOTAL})
COL_HOST_FG=$(tput setaf ${i})

# Colour commands
COL_BRIGHT=$(tput bold)
COL_REVERSE=$(tput smso)
COL_REVERSE_OFF=$(tput rmso)
COL_NORMAL=$(tput sgr0)

# Unicode Characters
CH_TRIANGLE_R=$'\xe2\x96\xba'

HOST='\[$COL_HOST_BG$COL_HOST_FG$COL_BRIGHT\]\h '
WORKING_DIR='\[$COL_NORMAL$COL_REVERSE$COL_HOST_BG$COL_HOST_FG\] \w '
END='\[$COL_REVERSE_OFF$COL_HOST_BG$COL_HOST_FG\] \[$CH_TRIANGLE_R\] \[$COL_NORMAL\] '

PS1=\[$HOST$WORKING_DIR$END\]