how to revert my system to a particular date...

[Zhengquan Zhang mailing list <zhang.zhengquan.mailinglist@gmail.com>]

Today after sid upgrade, I found that my collins cobuild dictionary under wine
is unable to load..  I want to revert my system to the day before yesterday.
I tried to reinstall the dictionary and reinstalled wine but the dictionary
still failed to launch.

Now I want to restore my system to a previous state, I also want to know if
there is a more secure way of using sid, for example, I can set some
restoration points, when things go wrong, at least I can temporarily revert to
a earlier state and continue my work. Any pointers and suggestions are
appreciated.

Zhengquan