Read at a level slightly lower than what you understand. You should not have to look up a lot of words. It's okay to look up a few words.
Make reading a ritual. Choose a time and place to read every day or week. Commit to this reading time as if it were a job.
Read what interests you.
Understand what you'll be tested on. If you're working on your reading skills for a particular test, make sure to learn about the test. There may be specific formats such as advertisements that you'll have to read in the test.
Find free reading materials. Project Gutenberg is an excellent source, but be careful with public domain books that are written in outdated English. Some words and expressions are no longer in use.
Visualize what you are reading. Some people try to imagine they are reading a movie or a how-to video.
Listen and read. Find podcasts or videos that have transcripts and read along silently. You can also read out loud with the recording.
Relate what you read to your own life. How does the reading apply to you?
Think about the author or journalist. How would the reading differ if you were the author?
Check your eyesight. If you haven't had your eyesight checked in the last few years, make an appointment.