After all my research last week I started pulling all of what I learned into practice:
Keep in mind that buttons have to be large enough to be pressed
Text must be large enough to prevent eye strain
Watch capitalization because of licensing restrictions
Keep in mind the on-screen keyboard (not everyone has a keyboard case)
The other project for this week was finally getting all my artwork into suitable mockups. I have so far completed the restaurant portion of the mockups, including the drink coasters (as seen below).