I like these:
"Rocking Down the Highway" - Doobie Brothers
"Shambala" - Three Dog Night
"Go" - Andy Hunter
"The Happy Song" - Delirious?
"Songbird" - Kenny G
"Proud Mary" - Creedance Clearwater
"Take It Easy" - The Eagles
"The Impression That I Get" - Mighty Mighty Bosstones
"Backwater" - Meatpuppets
"Send Me On My Way" - Rusted Root
"Jump Right In" - The Urge
"Woohoo!!!!" - Blur
"Flood" - Jars of Clay
"Right Here Right Now" - Jesus Jones
"Boys of Summer" - Don Henley
"No Rain" - Blind Melon
"Low Rider" - War
"She's So High" - Tal Bachman
"Interstate Love Song" - Stone Temple Pilots
"Every Little Thing Counts" - Janus Stark
"Seether" - Veruca Salt
"Here & Now" - Letters to Cleo
"Right Here, Right Now" - Fatboy Slim
"Award Tour" - A Tribe Called Quest
"Mothership Connection (Star Child)" - P. Funk (Parliament Funkadelics)
"Hey Ya" - Outkast
... I've got hundreds more...seriously...CDs that I've made of the most ecclectic mixture of songs put together, but good for driving, working out, chilling, whatever. :)
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Any kind of trance/hard trance music is good too.
Any song by Jeremy Camp, Switchfoot, Enya, Benjamin Gate