If you can buy the DVDs buy them, if you have no money or the anime is not yet licensed/dub suck/anime's too long you can download them or watch them online.
Manga are Japanese comic books, I think you might be confusing it with hentai. Check this website for a calendar of anime that are coming out in Japan http://anidb.info/perl-bin/animedb.pl?show=latestanimes
Howl no Ugoku Shiro(movie) romance/fantasy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1127
Sen to Chihiro no Kamikakushi(movie) adventure/fantasy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=379
Tenkuu no Shiro Laputa(movie) adventure/scifi
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=183
Mononoke Hime(movie) romance/adventure/fantasy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=247
Mari Iyagi(Korean) fantasy/adventure
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1327
Kamichu! - 16ep romance/magic/adverture/fantasy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1359
REC -9+1 12min eps romance/shoujo
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1549
One Piece -305eps 7Movies(ongoing) adventure/comedy/fantasy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=231
Naruto -234eps 3movies(ongoing) adventure/comedy/ninjasO.o
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=549
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1832
Gakuen Alice -26eps comedy/romance/shojo
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1062
Eureka Seven -50eps romance/mecha/adventure/sci-fi/comedy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1171
R.O.D(Read or Die) -3OVA + 26eps sci-fi/adventure
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=273
Ichigo Mashimaro -12eps 3OVA comedy/slice of life
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1344
Petopeto-san -13eps comedy/romance/magic
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1376
Ranma 1/2 -143eps 11OVA and 2movies (I think) comedy/romance
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=264
Nana -38/50eps (ongoing) comedy/shoujo/romance
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1618
Bokura ga Ita -26eps shoujo/romance
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1698
Suzumiya Haruhi no Yuutsu -14eps sci-fi/comedy/fan service/romance
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1609
Gunslinger Girl -13eps sci-fi/violence
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=676
Akira (movie) - sci-fi
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=14
Haibane Renmei -13eps fantasy/drama
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=408
Kamisama Kazoku -13eps romace/fantasy/magic/comedy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1659
Koi Kaze -13eps romace/drama
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=772
Kodomo No Omocha -102eps shoujo/romance/comedy/slice of life
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=180
Aishiteruze Baby -26eps shoujo/romance/comedy/sol
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=765
5 Centimeters Per Second -OVA (ongoing) shoujo/romance
http://anidb.info/perl-bin/animedb.pl?show=anime&aid=4568
Winter Garden -OVA romance/comedy/shoujo
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1804
Ergo Proxy -23eps sci-fi/
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1563
Shinigami no Ballad -6eps sci-fi/fantasy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1584
Mushishi -26eps fantasy/sci-fi/adventure
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1492
Azumanga Daioh -26eps comedy/sof
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=34
Battle Programer Shirase(BPS) -15eps comedy
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=670
Ghost in the Shell -26eps +26eps 3Movie -violence/sci-fi
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=116
Lucky Star -(new) 5/unknown ongoing comedy/moe
http://anidb.info/perl-bin/animedb.pl?show=anime&aid=4777
Heroic Age (new)-6/unknown sci-fi/mecha
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1868
El Cazador de la Bruja (new) -6/unknown
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1882
Lovely Complex (new) -5/unknown comedy/romance
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1896
Bokurano (new) -6/unknown mecha/drama/sci-fi
http://www.anime-source.com/banzai/modules.php?name=Anime&rop=showcontent&id=1884
Here's a good long list chose one depending on what you feel like watching, try watching them in Japanese with English subtitles you can download any of these fansubbed using Bittorrent if you don't know how to use it I wrote a guide with some Videos that's very easy to understand in my Myspace under blogs on how to use it http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile&friendID=1520233 if you have questions add me to messanger.
If you want to watch them online try these, the first three have better video quality
http://www.veoh.com
http://stage6.divx.com/videos/
(you have to install a divx plugin it asks you to)
http://www.crunchyroll.com (you have to sign up)
http://www.youtube.com
http://www.GoFish.com
http://www.vidiac.com
http://anime-eden.com (you have to sign up)
If they don't have them you'll probably have to download them or buy the DVDs but there may be other places online