Along with the other metronome posts....
This may sound a bit strange, but put your bass down, sit with a metronome set at a reasonable tempo (60 bpm is fine) and clap your hands with the click. You know you're getting where you need to be when you can't hear the click ....consistently, over several measures. FWIW, metronomes with an actual click sound (as opposed to a "beep") work well for this.
When you've mastered that, at various tempos, set the click to play on the 1 and the 3 and clap out every beat. Then set the tempo to only click on the 1 ....and clap out every beat. You still need to be hitting the 1 with the metronome.
With your bass, set the metronome on the 1 and 3 again, play your favorite shuffle or blues scale, and make your metronome swing. It may sound static or artificial at first, but work on feeling the space between the click and what you're playing. It's very cool when the metronome doesn't seem like a metronome anymore.

