to be honest and trustworthy
ser honesto y digno de confianza (ser honesto y digno de confianza)
"I trust her completely because I know she’s always on the up and up."
"Confío completamente en ella porque sé que siempre está honesta y confiable." (confio completamente en ella porque se que siempre esta **on the up and up**)
to prepare for something
disappointed but having learned from the experience
to continue hoping even when it seems impossible
to adjust to new circumstances or environments
to start a friendly conversation in an awkward situation
take advantage of a good situation while it lasts