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There is a Process Guide at the bottom left-hand corner of Workflow Designer that analyzes your process on the fly for critical or warning items, on the fly. Pay attention when there are red crosses. They point out errors in your workflow that may likely cause your deployment to fail.
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To include a start and end bubble, you can either drag-and-drop them onto your process and join them to the proceeding and from the preceding activities, respectively, by manually adding transitions, ; or you can simply click on the "Insert missing start and end bubbles" icon.
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One thing to note is that your workflow designer Workflow Designer can run as a client. This means you can save drafts of your processes to your localhost and amend them any time until you are satisfied that they are ready for production.
When a process is ready for deployment, select Deploy from the File menu option, or update it if the process has previously been deployed.
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