If you truly sit down and think about it, where will you end up by chasing your desires / the dunya? No where. You get something you want and end up wanting something else. Even if you feel you have everything you wanted, you still feel unsatisfied. Look at the fake lives of celebrities. In front of the camera, they put on a smile. They drive expensive cars and have big houses. Behind the scenes, they're drugging themselves and sometimes even killing themselves. It's really just a big rat race where the end result is the same for everyone. Ultimately, we all will die and the only thing we take with us is our deeds. Some people choose not to think about death or the afterlife because they get too comfortable chasing an endless desire. We're on this Earth for a short time (relatively speaking). Our time in the afterlife is, well, timeless. In the quote from Imam Nawawi above, that's basically everything you need to know in a nutshell. Separating yourself from the dunya, get away from all the noises and distractions, perform the daily prayers, follow the sunnah and so on.
The shaytaan never stops working. Purifying yourself will make it easier to resist the temptations and the whispers you get. Start with having the right intention. Instead of listening to music, listen to a lecture or don't listen to anything at all. Buy a book about hadith, about the prophets, or anything related to the deen and start substituting that for TV shows. I'm not saying to dump everything you have in the trash, but try taking steps to break away from things that take you away from remembering Allah. Think about the people you surround yourself with. Are they a good influence or bad? If bad, spend less time with them or try to explain to them what you're trying to do and maybe you will in turn influence them to change as well.