Read easy books you can enjoy without translating. That way, you will understand better and so you will read more.
Don’t use your dictionary when you come across words you don’t know. Guess the meaning from the pictures and/or the story.
If guessing doesn’t work, skip over that word, phrase or passage and go on reading. You can often enjoy the book without understanding every small detail.
The going gets tough when the book is not suitable for your level or your interest. Simply throw the book away and start reading something else.
It will be easy for you to follow the four rules above, if you start with Japanese graded readers — Nihongo Yomu Yomu Bunko — published by ASK and Tadoku Bunko published by the Tadoku Supporters. The reading of Kanji, or furigana, is shown alongside each Kanji.