Since some of us a baking cakes I thought I could pass on some tips that actual cake makers have told me. Feel free to add and share some of your tips.

Now I was given some Coles brand cake mixes so I'll start there.
If the mix says to add 2 eggs put in 3. Always add an extra egg to packet mixes.
If you don't have milk just add water instead.
I have added a little bit of vanilla extract to this one but you can use vanilla essence but just a splash.
If you want an orange cake add orange juice instead of milk to a plain cake. (Butter or Vanilla cake mix) If you want an orange and poppy seed cake add the poppy seeds to the orange juice to soak 1/2 hour before starting. You don't have to but I'm told it's better to.
For a lemon cake add lemon juice. For a less intense flavour add half juice half milk/water.
For a banana cake add 2 to 3 very ripe bananas.
Try to use a spring form cake tin. Put the base on a flat surface, place baking paper on top, place the ring on top and close. Rip excess paper off. Rub butter around the inside of tin.
For a gas oven place it on the top shelf. Electric fan force place it in the middle.
Rotate it half way though.
Check cake by inserting a skewer or do what I do and touch the middle with your finger if it bounces back it's done.
Let it sit in the tin for 10 minutes before releasing the spring. Let it rest on a cake rack until completely cooled.
When you wash your tin put it in the oven to dry. It helps to prevent rusting. Wow this turned into an essay.

Update on my cake: It turned out well but gee Coles are scabby on the quantity. Next time I will put 2 mixes in. It has cracked a little on top which means the oven was too hot but that's tough. It will still taste great.

Update. I have made a second cake but have added baking powder to this one. It still feels to runny for my liking and I've dropped the temperature. Fuck you Coles I don't make pancakes.