Quite a lot of songs can pick me up and changes with my taste but:
The Mad Capsule Markets - Island
Toy Dolls - I've got Asthma
Toy Dolls - Nellie The Elephant
Rick Astley - Never Gonna Give You Up (Rofliffic.... what a legend])
Cock Sparrer - Runnin' Riot
Gonads - Gonads Theme
Splodgenessabounds - Wiffy woman
Frankie & the Flames - On yer bike
Dancing Badger Badger Badger.com! The Original! (Got me through 1st year of Uni)