Need more music for my iPod.?

I have an iPod Classic that i got about a year ago and it has 160GB (holds about 40,000 songs), but right now i only have 1,354 songs. I need more music to put on it to put my iPod's giant memory to use, and was hoping i could get some suggestions. I like to have music for every occasion, like drinking with friends, smoking, summertime, partying, snowboarding, sad, happy, etc. Any suggestions would be appreciated. By the way, Im mostly into modern things like rap/hip hop, rock, alternative. basically anything but country. I also enjoy some older stuff (older to me) like Sublime, Lyrnyrd Skynyrd, Billy Joel, Pink Floyd, Beastie Boys, etc. But any other suggestions would be great too. Thanks in advance.