There are two ways to make a bandage self macro:
Legacy Targeting: Create Macro - Use Bandages (drag them into the open slot) - target cursor self
SA Targeting: Drag bandages into an open hotkey slot, right click and set target as self.
NOTE: There is a KNOWN issue with this macro in Legacy Targetting having a delay it should not have. Billy Teng is working on tracking down the problem and resolving it.
Regarding equip last ... there is no way to make a macro that behaves like this (trust me, I tried, cried, whined, and still pancake and moan that it doesnt exist). However, you can do something that - if you dont mind using multiple keys and/or single-click on a macro - works well and is more diverse.
Currently, you have to do this BEFORE setting up a dress macro, as there is a bug. Go to Macros - Equip and drag one weapon into the slot. Now drag that to a box. When you hit it, it will automatically unequip the weapon you have and equip the selected weapon. Completely seamlessly and with zero delay. You have to make an individual Equip macro for each weapon or spellbook (that is the sucky part).
I still DESPERATELY want a macro that functions like EquipLast, and feel like the alternate is a mere shadow of it functionality - mainly because it takes more keys to make up the same function, and you cannot currently set the weapon in question as the Macro Icon - but at the same time, the alternate way does have useful function.