Wheres the best place???

Right I have decided I'm gonna relocate my battery to clear out my engine bay a little more, wanna try and do this quick as have a show comming up in about 2 weeks.
I wanna know where others have put there and where people think it the best place for it.
I'm thinking of putting it in the boot as don't have time to build a bracket behind the front bumper, but am not sure what the best way of fixing it down will be.
Also am a bit of a noob when it come to car electrics (still learning) so what will I need to do this and how should I go about doing it???
Thaks in advance.
I wanna know where others have put there and where people think it the best place for it.
I'm thinking of putting it in the boot as don't have time to build a bracket behind the front bumper, but am not sure what the best way of fixing it down will be.
Also am a bit of a noob when it come to car electrics (still learning) so what will I need to do this and how should I go about doing it???
Thaks in advance.