Re: any good trance songs you can suggest?
Scooter's happy hardcore actually, not trance. Dance is a vague term describing fast paced music thats intended for people to dance to, most commonly house and trance genres.
Great list Kage, I'll make a more useful post to the OP on how I find music. Since Trance in North America isn't extremely popular anymore, and due to the amount of one hit wonders, it can be awfully hard to find new music. Theirs a few places I monitor.
-Radio shows, check out Armin Van Buuren's state of trance, Tiesto clublife (although it's lacking most of the time), above and beyond trance around the world podcast, John O Callagans subculture, global dj broadcast
-Other internet radio stations like di.fm
-Monthly album complimations for state of trance and global DJ broadcast, hits are often released on these before albums.
-DJ mixes on djforums.com are sometimes a great source of new tracks.
-Youtube, search one song, end up finding more. Also have subscriptions to a few music channels. Most electronic records label's don't remove songs from youtube, and infact most post music videos directly onto youtube.
-iTunes Genius, yes it's great. Also like youtube, searching around iTunes can lead to more.
-Beatport charts, I occasionally check them, occasionally have good stuff.