Try to plant an apple tree at the start of the game because it will become worth a decent amount once fully grown, and try to talk to Seedos everyday (you can usually talk to him more than once a day).
Try to plant turnips, corn, and carrots at the start to attract "bait", you will need these pinata to attract many others, pretztail is one of them.
When the beggar comes, try to give him 1,000 and he will become a trader.