How to make a big fat bass

I guess everyone once came to a point where what ever u do ur bass seemed to lack the depth and that “fat” sound of the commercial tracks, so it would be nice if some1 actually explained the secret behind getting those basses sounds

one example:

Dunno if this will help but I watched ‘In the studio’ with sean tyas and he uses Wave’s Renaissanse Bass plug in, he says it makes your bass sound big and round. That might help. But I suppose it will only be able to do so much though