1) Vampires are just gangs on PCP
2) Never wear costumes, not even on Halloween
3) Not all slayers are good, but the bad ones have
a better attitude
4) Try to be different from the rest in the series.
The normal humans always die first
5) Having a vampire boyfriend may be worth it,
but causes major traumas later.
6) No man made weapon kills the judge, Unless you
have acess to a Military compound
6) Even if the arrow misses the heart start preparing
the funeral.
7) Just because the doctor says she'll never wake
up, doesn't mean she won't!
8) The nice lady from the initiative has a very
nasty secret,. (Several in fact)
9) As a slayer it is impossible to find your average,
run of the mill boyfriend!
10) If you are the second slayer on the hellmouth,
prepare to die very soon!
Lessons
Learned from BTVS