Building a House in Chennai - NEED ADVISE From guys who just completed their house on what not to do ?

pls advise What to do & what not to do ? I also want to incorporate Solar Lighting Pls advise viability & how to go about it ? I want to do exposed brick work pls advise the things I shud be mindful. I WANT TO EXPERIMENT WITH HIS CONSTRUCTION CAN GUYS GIVE ME INNOVATING IDEAS ON THINGS I CAN DO TO MAKE IT A COST EFFECTIVE & INTELLIGENT BUILDING ....