https://www.youtube.com/watch?v=-cfx0kzO3Vg

All bass players should aquire a group of 12 flash cards 

Practice plucking the first 4 notes (frets) on each string. One finger per fret and alternating between index and middle of plucking hand.  Remember...50 sets on each string? 

Practice the first 5 notes in Bb major *Bb C D Eb f using correct posture and hand position.

Look at the cooresponding line for your bass. See if you can play through each one slowly paying attention to finger placement.

modes

 check out this video then

https://www.youtube.com/watch?v=Wv0H9i9JINc

practice the following intervals on your bass.

third

fifth

octave (8)

minor third

major sventh

minor seventh

This is the great Bill Dickens showing many techniquescand skills on the bass that every bass player should know.

https://www.youtube.com/watch?v=4IxJ1yNE0h4