When I graduated, I subbed for a year and a half before getting a full time teaching position. Yes, the pay is lousy, and there are no benefits (usually). But it was very rewarding. As a certified teacher, you certainly have a leg up on other subs out there (my school often gets semi-warm bodies to sub). If you establish yourself as a teacher, rather than a glorified babysitter, it will help. I subbed in only a few schools since the need was high, and got known among the students in those schools as Sargeant Sub. They knew I was there to teach, but we could also have fun if they did things my way! One BIG suggestion...have a bag of tricks with you (literally...a bag with emergency lesson plans). I subbed in schools where the teacher left no plans at all. In my very first sub job, the teacher left plans for a 50 minute lesson that simply said, "Apple cutouts." I'm sure the teacher had a multisensory, interdisciplinary, hands on, motivating activity planned -- in her head. All I saw as a sub was "apple cutouts." So we cut out the cardstock apples on the teacher's desk. OK, now what do we do for the other 45 minutes of the lesson? I ended up reading from the class chapter book. I then brought in my own things that I could use as time fillers or lessons. The book The Lorax (Dr. Seuss) can be used as a simple read aloud for younger students, or as a writing/discussion starter for older students on the ethics of logging/conservation. Brain teasers and logic puzzles were good too. Good Luck!