Reddit reviews Mel Bay Walking Jazz Lines for Bass

I start by picking a different key each day and playing it in each mode to cover the board. I play them each straight, in intervals, and arpeggios.

Then I work on sight-reading. Take a chart and play it through with the metronome slow, than again at speed. Then maybe do another one. Or not. I usually use the book "selected duets for trombone and baritone".

Then I'll try to work on a few walking patterns. My walking gets competent but uninspired pretty quickly if I don't bone up on new intervals, jumps, etc., so I'll pick something like II-V-I turnarounds and try to commit something new from Walking Jazz Lines for Bass.

Then I'll pick a chart from the real book. Play the melody. Play through on the changes, trying to incorporate a new pattern from the step outlined above. Then I'll try to find a backing track and do some improvisation.

Then I repeat the last step until I have to do something else.

I use the metronome at different speeds throughout.

This is one of the best books on understanding and constructing walking lines.

Mel Bay Walking Jazz Lines for Bass Amazing book!
Just as applicable to DB as it is to electric.