The title says it all, I want some quick and easy tips techniques to firm up my tummy in a month.

Much appreciated

First, you should consult a doctor.
Then, work on posture and core stabilization:

Resist-A-Ball Training Stability Balls Exercises Fitness Workouts (http://www.resistaball.com/)

Find the excersize ball that fits you and sit on the ball instead of a chair, like at your computer.