yes for everyday life on my ubuntu linux i mainly use
~firefox web browser
~Pidgin IM client
~i play Tee Wars
~Compiz Fusion for cool desktop effects
~for my music player i got Banshee music player for its iPod support
~Obviously the openoffice suite for office
~for E-mail im going to go and get thunderbird so i can read my Aol and G-mail messages
I recommend all of these applications
There ya go

i cover everything you asked for... But what linux do you use? i use ubuntu