You have not mentioned your Desktop, if you happen to be a KDE user, Klipper
has some amazing features.
The traditional expectation of a clipboard is that you can copy a section of text in order to paste it elsewhere. If you copy a section, the previous one is lost. Klipper solves this problem at a stroke. The item you copied last will still be the default one to be pasted, but others will have been stored in a buffer, so you can choose to paste your selections in a different order. Even the number of items stored in the buffer can be configured!
Also, if you are a heavy mouse user, middle-click copies and pastes text in a separate clipboard.