I think my favorite website is Bible Gateway. I love it because at the click of a mouse I can access many different Bible versions, look up verses, find a reading plan, use a commentary of Bible dictionary as well as many other study guides. It is a great way to study quickly and efficiently.
"Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth."
II Timothy 2:15