Fast Level Up by Alternating Rasps and any 1-day crops

This technique is best applicable for those who can only tend at night with 2-3 hours to spare.

1st night, around 10pm, plant a 1-day crop (watermelons or cabbages and others). You gain 3XP per planted crop for this.

2nd night, around 6pm, you can harvest the 1-day crop you planted on the 1st night. (1 farm town day is equivalent to 20Hrs Earth day). Hire someone to harvest and plow. Then plant your raspberries. Rasps ripen in just 2 hours, so around 8-9, the raspberries will be Ready to Harvest. Again, Hire someone to harvest and plow. Then, plant your 1-day crop to harvest tomorrow at 6. Do it vice versa.

3rd night, around 6pm... (do step number 2).