A quick Ubuntu Linux tip: you can use the AltGr key to easily type various arrow and quote characters.

The ones you might commonly want to use are:

AltGr + y           ←   Left arrow
AltGr + u           ↓   Down arrow
AltGr + i           →   Right arrow
AltGr + Shift + u   ↑   Up arrow

AltGr + z           «   Left double angle quote
AltGr + x           »   Right double angle quote

AltGr + v           “   Left double quotation mark
AltGr + b           ”   Right double quotation mark