basically get paid cydia apps for free and full, add these to your sources:
http://ihacksrepo.com
http://repo.insanelyiph0ne.com
http://www.sinfuliphonerepo.com
these are must haves^
and i recomend geting these apps:
infinidock/infiniboard (scrolling left and right on dock, and up and down on springboard)
multifl0w + backgrounder (multi tasking)
lockinfo (put notifications sms calling calender and etc on your lock screen)
activator (launch apps or toogle lock your screen and stuff like that bye a gesture or button press)
Five-Column SB (add 5 columns to your springboard)
ColorKeyboard (pretty straight forward)