Most commonly encountered problem on blogger - "Your template could not be parsed as it is not well-formed. Please make sure that all XML elements are closed properly." This error message is usually accompanied by another message that indicates the actual reason for this reason. Hence, you should watch out for the next statement which may be one among the following.
<a href=http://abc.com">Example</a> should become <a href=''#">Example</a>
<a href=''source link"><img src="img link"></a> should be changed to
<a href=''source link"><img src="img link"/></a>
Well, only few errors are mentioned in the article above. There are plenty of errors which you might have encountered. Just share them via comments - possibly with their solutions as well. If not, just post the error you encounter and I'll try to fix it up for you!