Rules for how POR is used	Rules for how PARA is used
about to, to be in the mood, inclined to do something an action that remains to be completed because of by cause or reason duration of time during general physical movement in and around a given place for velocity, frequency and proportion in favor of instead of, on behalf of, in place of mistaken identity money or exchange, price multiplication and division per period of time through, along, by, in the area of to be seen as to express gratitude or apology reason (with ir, venir, pasar, mandar, volver, and preguntar)	contrast from what is expected deadline or specific time destination for the purpose of in order to object directed toward a goal recipient use employment
Idiomatic expressions with por	Idiomatic expressions with para
al por mayor at (or by) wholesale al por menor at (or by) retail gracias por thank you for palabra por palabra word for word por in the name of por acá/aquí around here; this way por adelantado in advance por ahora for now, for the time being por amor de Dios for the love of God por algo for some reason, that's why por allá/ahí/allí around there; that way por arriba above por carga by freight por casualidad by chance, by accident por ciento percent por cierto certainly por completo completely por consecuencia de therefore, consequently por consiguiente therefore, consequently por delante ahead por dentro inside, on the inside por desgracia unfortunately por despecho out of spite por detrás from behind por día per day por duplicado in duplicate por ejemplo for example por encima de on top of por encima de todo above all por ende hence, therefore por entre among, between por el contrario on the contrary por el estilo such as that, of that kind por el momento for the time being por esa razón for that reason, that is why por escrito in writing por eso therefore, for that reason por favor please por fin finally, at last por fuera from/on the outside por hoy today only por instantes continually, moment to moment por la mañana/tarde/noche in the morning/afternoon, etc. por la mitad in half, in the middle por las buenas o por las malas whether one likes it or not por las nubes very expensive por lo común generally por lo cual therefore por lo demás as for the rest por lo general generally, usually por lo menos at least por lo pronto for the present por lo que because of which por lo regular usually, as a rule por lo tanto consequently, therefore por lo visto apparently, evidently por más que however much por medio de by means of por mi parte as for me por mí mismo(a) by myself por mi parte as far as I am concerned por motivo on account of por mucho que no matter how much por ningún lado nowhere por ningún motivo under no circumstances por otra parte on the other hand por otro lado on the other hand (or side) por poco almost, nearly por primera vez for the first time ¿por qué? why? por regla general as a general rule, usually por separado separately por si acaso in case, just in case por sí mismo(a) by oneself por su cuenta all by oneself por suerte fortunately por supuesto of course por todas partes everywhere, all over por todos lados everywhere, all over, all sides por última vez for the last time, finally por último finally, at last	para in order to para mis adentros to myself para que in order that ¿para qué? what for?, for what use? ¿para qué sirve? what is it good for? para siempre forever para unos fines for one purpose para variar for a change