Mentally focus on one part of the task (try to find the easiest); do not keep thinking about the big picture and the time and effort it takes to do all of it (e.g., when you see a sink full of things that need to be washed you are likely to keep avoiding it because the task seems too large, so just start with the forks, cups, or plates)

Commit to working for 5 minutes (use a timer if you want) and hope that you continue past that time

Use a calendar/to-do list to break-down big assignments/projects into smaller tasks

Combine music, food, or other enjoyable things with the task so that it is easier to get going (you may have to remove these things later if they create a distraction, but at least you are now engaged)

Don’t sit in a fog too long; if you feel stuck, go do something else then quickly get back to the task (like restarting the computer)