Inspiration in my opinion comes when we come across something that clears our mind and soothes our feelings.
Being a designer and having a hectic schedule I often find my mind too cluttered with ideas and it often happens that due to time constraints I need to find something that makes me feel good and inspires me in a short time. Fortunately I have a open roof in my house where we have a small garden planted by my mother and father. Whenever I feel short on inspiration or confused I just go out into the gardens, stay there quietly for half and hour or more watching the trees and just being there silently in nature's arms and soon I find myself getting inspired to get a move on.
I believe our inspiration comes from something that makes us happy, when it comes to photography whenever I see something be it a nature related or any random thing that makes me happy I try to capture that very moment itself.