The main one for me would be
• Meowth always has to be in my team. Once I catch one Its probably the one I use the most. Trying to make him/her evolve the right way as soon as possible.
Depending on which Meowth I catch first:
• Male Meowth I always give it the same nickname, Ch'marr
• Female Meowth I always name her Xandra
others:
• Rotate between playing as a Guy or a Girl
• I name my player after my Family members. Example, I play as the girl, I will name her after my grandma and mom first name Maria
• Rival I will try and name it from a different country. When I start a new game, depending on what my favorite country (because of football or anthem) is, I'll try and name it as if the rival was born in that country. [quick example: last time I started the game, Antigua & Barbuda had qualified for the 3rd round of CONCACAF, so I named my Rival - Byers, after my favorite Antiguan football player Peter Byers]
• Battle every trainer, even in the gyms.
• I catch only Pokemon I don't have, the others I battle with Meowth/Persian to make it gain more experience