Visiting Vienna next week

HI,

I've finally decided to take the next week off, and am planning on visiting Vienna - and Innsbruck for hiking - from Tuesday to Sunday ( Protected content ). Does anyone have any specific recommendations, places or things that you think someone HAS to visit or see when in Vienna? I have a list of things... but... maybe too many! So I would appreciate any recommendations! :D

Thanks in advance (and hoping that at least a few of you see and reply to this before I get there ;) )! :D

Idhi