Many times while working with Sublime Text 3 I unintentionally close a file which I need again.
Every time this happens I must go to File->Open Recent->Reopen Closed File

With the attached file (stored in the User folder of your ST3 install) you can simply open the context menu of the tab by right clicking on it. The last entry will be now „Reopen closed file“

Unpack the following zip container to use the tab context menu entry.
TabContext.zip