Meals and meal planning. It's easy to burn a lot of time each day just cooking and eating. Meal prepping (or at least preparing large enough portions to last you multiple meals) is a huge time saver.
Make a daily and weekly list of what you NEED to get accomplished. Obviously, there's only so much you can accomplish daily. Decide what needs to be done today and use whatever free time you have to work on the longer term goals once you get through the daily list. Often, chipping away at the weekly (or longer term) list pays dividends later on. If you're studying 20 minutes or so a week out from a big test, you'll find you don't need multiple hours the night before.
Be good with down time. Find ways to be efficient with those awkward blocks of time in your schedule that often turn into browsing reddit or zoning out.
Find ways to do something you enjoy while working on the things you don't want to do.. If you like a podcast, listen to it while you do the dishes or fold your laundry.
Plan time for you. If you just grind all day everyday you can easily burn yourself out. Find time to do the things you enjoy, just moderate it. For example, if you're a gamer, limit yourself to a reasonable amount of time. Watch an episode or two of your show, but don't binge. Check Reddit while you're on the sh_tter instead of dedicating large chunks of time. Moderation, not elimination, is key.