Listening to music is a deeply personal thing, and everyone has different attachments to different music. Some people cannot get through their day without a constant soundtrack, while others can only handle 1 song or even dislike music altogether while they are trying to focus on tasks. For myself, there are certain genres I go to depending on the nature of the task at hand.
Calming Classical Tunes
If I need to answer a large number of customer emails or deal with any sort of situation which requires assisting a person/diffusing a situation, there is something about Classical Music that really helps with this. Whether it is the calming peaceful nature mixed with the brain-stimulating orchestration I do not know, but it allows you to pleasantly deal with just about any situation while still thinking clearly. I highly recommend this for the “Email” phase of your day.
If there is tedious or grunt work to be done, the rock music comes out. This could be anything from data input to assisting a customer with a technical issue (doing the work, not the email reply). It helps to just put your nose to the grindstone and power through, and it does help with your energy levels I find.
Stimulating Lofi Electronic Music
When I need to do research, I will often put on a very low-key electronic music of some kind to stimulate thought, as if I am exploring new ideas, I want place myself in a mental state where I will be more receptive to these ideas.
These are examples, but find what works for you as it is again deeply personal when it comes to music selection. There is great power in music though, and it can help with your day!