Depends on the definition of "some time" compared to the 2 weeks (solid?) it would take the automate. And how long you expect to continue doing said tasks.

That said, I would always err on the side of automating - at least some of the tasks. Take the low hanging fruit and tackle those first.

For example, I send out a weekly report containing a bunch of metrics sourced from our website monitoring tool. It took me a couple of days to automate that, but it saves me a good hour every week (and means I don't make mistakes copying and pasting figures which I used to with alarming regularity). It also means that my Monday mornings can start immediately without pounding through a repetitive task.