Pseudomonas is the most common bacteria among CFers. It is also found just about everywhere in our environment so avoiding it is nearly impossible.
The only thing really to do (without living in a bubble) is to take the ordinary precautions with handwashing etc. Compliance with treatments & if it doesnt interfere with lifestyle change too much avoid certain things like lakes, rivers, playing in the dirt etc.
I, personally, believe (this might be proven, but not sure on that) that once you culture it....you will culture it again even after clearing it for awhile.
I would rather live the way I want then to constantly worry about where I could catch it or worse yet....limit my living & STILL culture it!