1.*  Talk about it too loudly or to the wrong person.
If you tell one person, don't assume you've just told ten.
Although it is nice to think that everyone can keep a thing hush-hush, *people like to ******* talk.

2. Don't be discreet or otherwise use discretion when discussing it.
This is especially optional in public or with telecommunications such as phone and internet.

3. Act paranoid around authority
Act like everyone knows you're doing something "wrong".

4. Don't cover your tracks.
Or, if you do, do so poorly so as to let someone catch on to the secrecy with minimal effort.

If you do these things,
the cat will surly be out of the bag before long.