One project at a certain time
Indeed, one project! Only in a certain limited period of time. No matter how long this period will last, it is important that at this time you can, without being distracted by anything else, fully concentrate on work, on a specific project.
If you have already figured out what can distract you from work, then it's time to go directly to the project itself.
Preparation
Close all windows, applications, programs that relate to the previous project, and open everything you need to work with the new one. Gather all the necessary information. If it makes sense, then read the supporting documentation. It's best to start by making a list of what needs to be done.
Don't leave mistakes
The list items can also be such as "finish the design of the main page" or "test the operation of the application". It is important that these items are within reach and doable in the time that you have given them.
You won't have time to do all of them anyway. It is ok. The main thing is that there should be no mistakes in what has already been done. Therefore, check what you have done. The next time you return to this project, you will be able to start a new task without delay, without referring to the old ones.
Finish!
Eventually, the projects must be completed. The main thing is to understand and define this moment. And the most important thing in this is not the money that you will receive, but the fact that now you have the opportunity to do other projects, those that still need to be completed. After all, we hope they are always there!
All of the above tips may seem simple enough to you. However, using them will help you speed up the process of completing and completing projects. Fast and efficient!