I barrow them at my library and if I like it then I go online to Amazon or Barns and Noble and get it.

At a school/public library.

I haven't read much manga in a while, really. Used to frequent OneManga until they shut down. I'm all across MangaFox, MangaReader, the likes these days, when I do get around to reading.

I use Kissmanga and Kissanime to read manga and watch anime, usually.

Mangafox all the way XD Really handy, especially for me.
I'm actually not allowed to read manga so I read them when my parents are out and when they come back I bookmark and close the tab immediately.

Spectrum Nexus is a good place, so in mangafox and mangago

Usually I find new places when I'm looking for a specific manga instead of just something to read XD

I used to buy the omnibus type magazines like Shonen Jump and Yen, but we no longer live near a -place that sells these, nor do straight maga books get on the shelves, so I'm limited to what I can get at the library.

I read online, buy where I can.