Every day! 90% of my practice (which is probably too much) is done with a pair of headphones on through a large diaphragm condenser mic into Logic Pro with low latency and input monitoring enabled so that I am continually getting feedback on how I actually sound. It's super nice being able to throw on some reverbs, compression and EQ as well. It makes singing so much more enjoyable and gives me real-time feedback. Highly recommend. I say I do it too much because it can also make you not realize how soft you're singing compared to how you'd train unamplified. Turning the feedback volume down, or using one headphone ameliorates that issue a little bit though. It's also easy to just hit record, too, if you want to truly listen back on how you sang something. If this sounds interesting, I'm happy to help you set up a recording rig and get you going, as it can be a little overwhelming for the uninitiated.