Involve body mechanics with your playing.
After I'd been playing bass and regularly gigging for about 10 years, I was listening to some recordings of our live shows and realized my timing was erratic and I would frequently hit some notes too early. I remembered the advice from some professional bassist, which was to tap your foot or bob your head in time to the beat. You essentially become your own metronome.
I found this worked exceptionally well and the results were immediate. My timing improved dramatically, and the drummer in my band, who had a degree in music performance, commented on it, saying that I had acquired a much better "groove".
After I'd been playing bass and regularly gigging for about 10 years, I was listening to some recordings of our live shows and realized my timing was erratic and I would frequently hit some notes too early. I remembered the advice from some professional bassist, which was to tap your foot or bob your head in time to the beat. You essentially become your own metronome.
I found this worked exceptionally well and the results were immediate. My timing improved dramatically, and the drummer in my band, who had a degree in music performance, commented on it, saying that I had acquired a much better "groove".