Is it better to have a blog, say with Wordpress, and link back to my Yola site to get more traffic to my site?
well... there are a number of ways to obtain additional traffic and having a blog can be indexed differently in google, visitors to your blog can click on a link to obtain traffic to your yola site. I have a blog through blogspot in relation to my website through yola and I do occassionally get traffic from my blogspot.
Have a blog on your site,blogspot and or word press.Make sure you link back to your site from the other sites...This will give you one way links to your main site.Submit your site blog to blogged.com to syndicate it...If accepted each time you update your blog it updates on their site also and provides more links to you....Add your blog to your facebook account,linkedin etc . . . all of them will provide links back to you.Regardless of if you ever get a visit from those sites or not this still helps you.