Just tidy it up a bit, please.

只要把它收拾一下就可以了。

Now, I don't want to tidy it up, just depresses me, so...

我不想收拾了，有点郁闷。

Many people would mess the hotel room because they don't have to tidy it up themselves.

许多人会把宾馆房间弄的又脏又乱，因为他们用不着自己打扫。

The solution out of this is simply to create a system for organizing and routinely tidy it up.

解决办法就是建立一个系统来管理与归档，并定期整理与清理。