I've been watching through season 4 of Buffy and Season 1 of Angel concurrently and I'm about halfway. Looking at the crossovers I've seen so far alternating should work if you start with Buffy episode 1. You'll have to switch every episode though and sometimes that kinda ruins the mood when you are into one shows atmosphere.
Ngirl's list is designed to let you watch a couple episodes in a row while still being safe from missing something. IIRC it was made especially for people watching on DVD's so they don't have to switch the discs too often.
It LOOKS like she got that list from this website:(Zazi might want to avoid going to it for now)
http://buffyfest.blogspot.com/2009/04/buffyangel-episode-watching-guide.html
Hers is much cleaner since she has episode numbers, that website instead uses episode names which might be a bit spolierish. Zazi probably shouldn't go to it right now, but it does have lists for later seasons too.
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The batman villians all seem to be one big joke that batman refuses to laugh at - SantaRPG