Time travel will be used for the most mundane purposes imaginable. Corporations will hire multiple copies of the CEO for all management positions. Employees will be forced to go back in time so as to never have any time off - sick days will be a thing of the past, because you'll just come back when you're well. On the plus side of that scheme, you can have whatever preferred schedule you like. Two days on, five days off? No problem, as long as you're in the office Monday to Friday. Three months of leave per year? Go for it, just come back to the beginning of your holiday when you're done. It would get tricky to track, and some employees would, as a result, burn out a lot faster than others. Some, who take a lot of time off, would age a lot faster than others, who don't. That would be weird.
Mokalus of Borg
PS - Time travel, used this way, would lead quickly to the tech singularity.
PPS - Because corporations will want whole research eras to be done, literally, yesterday.