First the basics. Here are a couple of posts I did with some tips on getting started:
Otakus Unite!: On Planning and Running My Anime Club
How Less Is More (with instructions for manga bookmarks and Shrinky Dink keychains)
Ok, now here's what anime to show:
I host a teen anime club where I get teens from 6th all the way to 12th grade attending. I've created a Pinterest board with anime titles I've screened to show to my club. Feel free to check it out to get some ideas! I'll be frequently updating it.
Here are some posts I wrote with some activity and craft ideas:
Anime Club "Thanksgiving"
Cat Ear Headbands
Hiragana and Calligraphy
Japanese Food Tasting
Manga Duct Tape Wallets
Video Gaming: Rhythm Heaven Fever
Yonkoma Manga Workshop
And finally, if you are brave enough, here's how to host a mini-anime con!:
On Planning and Running My First Anime Con