Reports with Data from Leads AND Accounts

Reports with Data from Leads AND Accounts

I want to generate and export a list for direct mail so that I can send these contacts and/or companies a marketing piece. I attempt to do this in the REPORTS module but you cannot select Leads AND Accounts' data for the same report. The problem is that I need contacts or companies from both the LEADS module and ACCOUNTS module. I know I could generate two different reports but I don't want to. Is there a better way? Why can't you generate a report using both of those modules?