Ryhthm -- Also (if you know basic chords to a favorite song, or just power chords to a favorite song/songs)
Play along with the recording. Also try to play with other guitarists, bassists and drummers.

Practice -- Quality vs. Quantity. I always sugesst 30 minutes at least per day. But the 30 minutes needs to be a focused preplanned practice. Anything after that could be just whaling away play your favorite song over and over and over, scales what ever.

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