Are you overwhelmed by the idea of cleaning up your database? Rather than trying to fix it all, focus on just ONE area within the database and work from there. For example, do all of your contacts have email addresses? If not, identify those that are missing email addresses and work up updating those records. You could use google searches, postcards, or phone calls to update the information. And if that’s too overwhelming, start with a specific subset of records, like members only, or members in a given state, or maybe just members serving on committees.
Whatever the idea, start with ONE to get things going. Small successes will lead to larger ones, and over time your data will be cleaner and cleaner. As the old saw goes, you eat an elephant one bite at a time!