Tutorial 7: Review projects
Periodically, you should review your projects to make sure they're in good shape. For this example, imagine you've been using OmniFocus for a while now, long enough to reach the one-week review period for some of your projects.
In planning mode, show the view bar by clicking the glasses icon in the toolbar. From the project filter menu (above the sidebar), choose Remaining; this shows all of your active and on-hold projects. From the view bar's grouping menu (with a curly-brackets icon), choose Next Review; your projects are grouped in order of when they're due to be reviewed.
Look at each project and decide whether it's in the state it needs to be in. Are there new actions you need to add to it? Is it something you still plan on doing for sure, or should you change its status to On Hold? Is it something you should give up on, and change its status to Dropped? If it's already on hold, should you set it back to Active status? Once you're satisfied with the state of the project you're reviewing, choose Mark Reviewed from the Edit menu (or use the corresponding toolbar button) and move on to the next one.
This regular evaluation of each project can be a huge help; when you're planning well, you work well.