The bass end of your mix is the very backbone of music as it holds everything together but can be difficult to execute.
You must know your basic compressors to control how your volume operates. The key is to experiment and expect subtle results that pay off within a mix. You must also use the principles of tip 2 to EQ them apart so you can blend them well. More importantly the programming of a bass sound is vital to how it ultimately provides a backbone.
Read more about this here: http://www.musictech.net/2018/06/6-ways-improve-your-bass/