It seems you already decided to seek greener pastures and your main concern is what to do until you find something else. What I have done the couple times I fo

It seems you already decided to seek greener pastures and your main concern is what to do until you find something else. What I have done the couple times I found myself wanting to move on was to inform my supervisor up front. I ask if it is ok for me to seek new challenges elsewhere. This way there is no need to hide from them you are actively pursuing another job and once you get a new offer, they are not surprised when you give the 2 weeks notice. Now, needless to say that until you find something else, be professional. Show up on time, with a smile and perform to the best of your abilities.