Each day recognize a successful CS student or team or project with a school announcement and the delivery of an award ribbon to the student in his/her first hour class (not your hour)

Collaborate with math, science or other teachers to reciprocate, sharing with students, famous inventors from each other's field of study.

Host an open house after school complete with "puppy chow" or chex mix snacks - otherwise known as "bits and bytes"

Invite past students in to "tell it like it is" about CS careers or college

Make each day a special day in your classes with fun activities or something unusual that focuses on the impact CS makes in the lives of your students.

I can't remember how this was done but.... a computer program was used to match up the "perfect couples" based on interests, etc. I sort of remember a fairly long interest inventory and a fee of a dollar or two to get the names of 10 other students that "match" you. FWIW it might be
a fun $ maker for the CS club.

Collaborate with the web team to feature something about your classes for the week, - projects, CS careers, successful former CS students from the school, etc.

Collaborate with the lunch room "ladies" to rename the items of each day's menu to some clever computer related term. ..just for fun...infinite loop spaghetti or Grace Hopper Pie...(from Pat Phillips, mainfunction.com)