Tips and Tricks
Remember the more monsters you take the more chances you'll have. So the first thing you need to do is purchase an additional belt slot, to carry more monsters into battle.
Use up your freely available Ink, rather than wait for your monsters to be knocked out.
Always pet Toto before you stop playing the game. This will make him happy, and therefore produce the full amount of Ink possible for one hour.
If you want to play this game for any considerable amount of time, you'll either have to cough up some dough from extra currency, or you'll need to be very conservative with the way you spend the Gold you earn naturally.