Characters - Don't waste money on these in the earlier levels, they don't generate much revenue, and are generally just a pain to use.
Items - Items are a really good way of earning Corrie Gold as they don't need restocking. Limited time items such as cars are a great way to boost your income too.
Houses - Useless until this week, houses now generate rent in the same way items generate Corrie Gold, so they're good earners.
Hopefully as the weeks go on more ways of playing the game will be added, but as of now, these are the only hints I can give you, so enjoy playing and I hope I've helped!
