Jesus haha.... Just make sure you keep it to 4 alevel equivelents maximum.
I did 4 AS then in 2nd year dropped 1 AS (compulsory), so I ended up with 3 full A-levels.
That's ideal really... If you do 5 AS and 4 full A-levels then you won't hardly get any free time at all... and be bogged down.
You won't need more than that to get into Uni etc.