Master of Orion/Obscure Interface Features

Scrapping Missile Bases: Yes, you can do it! Select the planet with too many missile bases. Press 'B' and you will get a slider asking how many bases you'd like to get rid of.

Why? So you don't have to pay maintenance on those bases any more. Useful for planets which are no longer near enemy lines. e.g. after you've wiped out an isolated race.

Seeing attacks coming: Improved Space Scanner and Advanced Space Scanner open up a new feature in the interface. Pressing F7 or F8 will now step you forwards or backwards through all the planets that you control that are the destination for an enemy fleet or transports. You need never miss an incoming attack again!