кстати(=I just remembered: Come to think of it, I know someone who can help. • I have a screwdriver in the trunk of my car, come to think of it.Interex)
да и вообще(от "when you come to think of it": I haven't been to Spain in a couple of years. You know, come to think of it, I haven't gone anywhere in the last few years.VLZ_58)