If in Thailand take your passport and approval letter to Immigration for them to enter the visa. It requires two empty pages, so I assume one page is for the visa sticker and one for something else, maybe a re-entry permit.
Remember to wave goodbye to the IO.
As discussed in the webinar, the annual report resets upon international travel, so the year in the kingdom counts from your return. Unknown if there will be an online reporting page and if one is still required to file TM28 after returning from travel.