Ideas are in abundance. You are smart if you can look around and identify ideas and opportunities. You are doing yourself a huge favour if you make a notebook of all your ideas and visions and keep adding to the list as frequently as possible. But thinking of ideas and making a notebook will not make it a reality neither working on 10 different ideas at the same time. This is what I have learnt and re-learnt many many times over the last many years.
Almost everybody have multiple constraints on why they cannot work on 10 different ideas at the same time. If there are no other constraints then time certainly becomes a constraint. Be an ideas individual but become a doer than a thinker. Think and Do. Focus and make an idea a reality. That is what’s going to add value to your life and to the world.