What you wish you would have brought (or not) (San Salvador)

Moving to San Miguel next month with my husband, and we are only packing a few suitcases. What do you wish you would have brought, or regret bringing?

Narrowing down my list of what to bring is difficult! I keep hearing people say to bring good peanut butter, is it true or does San Miguel have good peanut butter? Also, I hear household products like hair and makeup things are more expensive, but I don't live there yet so I don't know.

Excited to move soon and don't want to pack a lot of unnecessary things!