What are /r/basslessons' favorite Products & Services?

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Depends on what you want to do; one of the undisputed greatest bassists of all time only played with his right index: http://www.metafilter.com/75769/James-Jamerson-Motowns-Secret-Weapon
I picked up the bass after being inspired by Steve Harris, to that effect I worked on three finger gallops, then found out he only uses two.

Are you planning on being a pro? Then learn like a pro, which means all of the right hand methods including a pick.
But hell, when you're in the moment, forget that you have hands and let them make the decision.

This is very good book https://www.amazon.com/Music-Theory-Bass-Player-Hands/dp/0996727604, it's more of workbook than a text book so there are exercises and little quizzes to do. The Author also has included links to videos of all the exercises.

A little late to the party but you sound just like me dude, was playing tabs and could do a few scales, but when I wanted to start playing triads and stuff, I needed to learn sheet music. I bought this book off Amazon and sat down 10 hours a week going through it. It does a good job of going string by string, showing you the notes applied to actual sheet music. There’s some tab examples but after a month or so I didn’t need them anymore. It really helps if you say the note you’re playing as you play it too.

Hal Leonard Bass Method - Complete Edition: Books 1, 2 and 3 Bound Together in One Easy-to-Use Volume! https://www.amazon.com/dp/0793563836/ref=cm_sw_r_cp_api_i_C.xyCbV7M9AWF