Here are 5 tips for better focus:
1. A,B,C
If you struggle with getting important tasks done and find yourself focusing on things like cleaning the kitchen when you need to sit down and finish a big project, this technique is for you! At the start of your week list out the tasks you need to accomplish. Go back and mark each task with the letter A, B, or C depending on how much of a priority it is for you to accomplish. Always get your A tasks done before starting on B tasks, and B tasks done completely before starting on C tasks.

2. Write the distraction down
Have you ever sat down with the intention to accomplish a task and thought something along the lines of "I need to order ___ now or I'll forget!" and find yourself scrolling the internet, losing track of time, and becoming frustrated with yourself?

You're not alone!

Next time you need to finish a big task, have a piece of paper or your notes app on your phone out beside you. Write down every thought that pops into your mind that may be tempting to go do instead. Once you spend at least 30 minutes on the task, take another look at what you wrote down and reevaluate if it's really necessary to get done, or if it just felt like it in the moment.

3. Pomodoro technique

This is the simple technique of setting a timer for yourself when you're trying to accomplish a task. Set a timer for about 30 minutes and tell yourself you can have a break after it goes off but you must focus in that time. Then, take a 5 minute break and start again.

4. Task list and calendar

Have a daily task list as well as a calendar and make sure these match up with each other.

Utilize the A,B,C technique here as well.
Don't try and put all your information on a calendar, having a separate task list can help you focus on details, while a calendar will help you see the bigger picture.

5. If it takes less than a few minutes, do it now

Are you putting off a task that would really only take a few minutes if you just did it?

It may be an uninteresting task or one that feels frustrating, but if you train yourself to just do it really quick, this can help reduce the chance of little tasks building up and becoming a big issue later.