Overthinking

l have the same problem.. i'm practicing meditation to train my brain but have to do it everyday and real benefits will come in a year or so.. try watching videos on meditation by actualized.org on youtube.. he has some great advice.

Let me think about that.

Yes. Believe me... I over think as well. I've learned that it's not always the best thing to do but it helps you being realistic and careful in life. There are times where you should put the overthinking aside and just focus on the present and what matter at that moment.
Basically it has a positive side... but unfortunately a huge negative side as well if you can't control it.

yes, lots of people overthink things, which can cause problems if it interferes with actually being able to get things done.