Focus is important. To focus is to do only one single task at a given time. But this is very hard to do.
Follow the following steps
1. Remove all distractions – silent and put away the smart phones, disable all notifications (email, messenger etc), stay away from people who love to disturb you etc
2. start small – start with 10 minutes focus time to do one small task and let youurself drawn into the task further without you know. split tough and huge tasks to smaller ones to achieve. Most important is to have PROGRESS
3. take a meaningful break. Focus is tiring. So take a solid and meaningful 10 minutes break everytime you complete a tough task. For example, drink water, stretching, have a meaningful and necessary discussions with colleague, check emails/messenger etc