Scammers pose as representatives of charitable organizations like the Red Cross or Kid type charities, that are seem real.
Be wary of high pressure tactics, representatives that avoid questions. Never give credit card information via email or phone. Never give cash or write checks to the solicitor.
Fly by Night E-Commerce sites
These type websites offer the must have products, they take your money and shutdown the website before shipping any products. Only purchase from trusted e-commerce sites. Never click on links in emails to e-commerce sites, if its a reputable site you want to shop from, type the web address directly into your browser. If it is an online store your not sure about do a Whois check to see when the website was registered and be wary of brand new sites.