The first step to getting better at reading is to read. Reading frequently across variegated genres will increase both speed and comprehension over time. Consume anything that interests you: fiction, essay, criticism, nonfiction, poetry, pamphlets, philosophy, math, history, news, blogs, instruction manuals on how to fix your microwave...whatever snatches your attention away from the little handheld robot masters!
It might also help to spend some minutes reflecting about what you've read. Investigate the subject, themes, rhetorical devices, and characters throughout your day. Just see where your mind takes you!