Masculine or Feminine?

So I have a pretty good level of french, but its spoken french, my grammar is a disaster. One of the things that annoys me is never having a clue whether something is masculine or feminine!

Well I have been studying up and am currently flying through an intermediate grammar book. I found a chapter on masc/fem and who knew but there are RULES! Why did no one tell me this before!!

So I'm going to do a very limited sum up here for those who are interested. Anyone who's reading who has no interest in french, stop reading now!

So all words ending in:

• age - except nage, plage, cage, page, image which are feminine
• ment
• eau
• phone
• scope
• isme

are masculine so are le or un e.g. le fromage

All words ending in:

• tion
• sion
• té - except côté, été, comité, deputé, paté which are masculine
• ette
• ance
• ence - except silence which is masculine
• ure - except mercure/cyanure which are masculine
• ode/ade/ude

are feminine so la or une e.g. une voiture

Then theres are some lists:

Masculine:

un- problème, système, programme, volume, modèle, groupe, domaine

Feminine

une - couleur, odeur, saveur, peur, douleur

I'm not an expert I just found this today, but I thought it was quite helpful. No doubt its in no way exhaustive but its a start!