Always park all of your projects downhill by noting down the next concrete actions before putting it away. When you then switch into a project there will be a c

Always park all of your projects downhill by noting down the next concrete actions before putting it away. When you then switch into a project there will be a clear and immediate todo to perform, that serves as the hook for retrieving the context from your brain. I find that a 10 minute break followed by a clearly defined action item is usually enough to get me going.