You're doing through Open HS right? make sure to have a read of their additional materials and grammatical explanations and actually work through your packages regularly
Anything in French will be useful so just do heaps of wide reading/watching - French books (bookdepository has some and free shipping too- go for like harry potter in french or something), magazines or newspapers if you can get your hands on them, French News on SBS (8:30am i think), French movies (if u have netflix just use Hola unblocker to access from France), duolingo also has this translation feature where u translate french texts to english so that could be useful as well
music:
https://radio.adelaide.edu.au/program/un-air-de-france/ this is also good, just click on Listen Again, otherwise just youtube french songs or download french radio apps
Dictionaries: wordreference is really good and obvs try to stay away from google translate,
http://www.linternaute.com/dictionnaire/fr/recherche/synonyme/ and this website is good for synonyms
Also, just keep working through and practising and be consistent!
edit: wait jokes if you are doing through Open HS you can borrow some of their french magazines (maybe newspapers too)