A bass playing tip concerning sound production: Most bass players have a set plucking/striking hand position.
Try playing a riff, lick, line or melody you have often played before, this time moving your plucking/striking hand to either side of its standard position.
Notice how different the string tension feels.
Notice the change in sound.
If it is better, use the new position for that particular sound.
Try this too: Take one of your stock standard lines and play it in at least 20 different ways.
Think laterally.
Hit the strings a lot harder than you have ever done before, play softer, play very legato, play very staccato, mix the two, play the line a lot faster, play it a lot slower, play it in a different position, a different key, a different register, slap it pop it, pick it, mute it, change the feel from straight to swung or vice versa, use a completely different fingering for both left and right hands, change the line from major to minor or vice versa, play it with your eyes closed, imagine a scene to suit the mood of the line, hold the bass in a completely different position...
and so on.
If you have not discovered at least one new and potentially useful thing through this experiment, start all over again with an open mind.
Still not enough? Imagine playing another instrument.
Think of the sound of that instrument.
Think of its typical phrasing.
Vocalize it.
Then re-create the sound your are "hearing" on your instrument.
You might be surprised!