Know your rights, protect your rights.
If the police ever come to the door and want to talk, step outside and close the door behind you. If they see anything criminal "in plain view" it's admissible even without a warrant. The same goes for your car, if you are asked to get out of your car close and lock the door behind you, and open door is an open invitation. Cops will sometimes try to tell you that they want to help you but only if you let them look in the car/home. This is not the case, the police are paid to gather evidence to convict a suspect, not to help them, that's why you have a defense attorney. You can refuse to consent to a search and it's ok to tell an officer, "I do not consent to any kind of search" if they ask. Sometimes you will get the question, "Well, since you're not doing anything wrong you won't mind if I take a look." This is the time to say you don't consent.
The same goes for your house, if officers ask to come in then anything they see (even without a search) can be used against you. They don't have the right to enter without a warrant and remind them of that fact.
Know your rights, and don't let anyone intimidate you into giving them up.