I love Evernote and it's OS X quick notation feature but it didn't automatically start up in Mavericks, even with it's preferences checked and it's login option. If you want to fix this issue and have the Evernote Helper start with your machine please follow these instructions.
>>Finder >>Applications>>
>>*Right click on Evernote*>>
>>"Show Package Contents">>
>>Library>>Login Items>>
>>*Right click Evernote Helper*>>
>>Make Alias>>
>>Drag Alias to Applications>>
>>
menu>>
>>System Preferences>>
>>Users & Groups>>Login Items>>
>>click +>>Add Evernote Helper Alias
>>Finder >>Applications>>
>>*Right click on Evernote*>>
>>"Show Package Contents">>
>>Library>>Login Items>>
>>*Right click Evernote Helper*>>
>>Make Alias>>
>>Drag Alias to Applications>>
>>
menu>>>>System Preferences>>
>>Users & Groups>>Login Items>>
>>click +>>Add Evernote Helper Alias