Let's use short cut keys when you use copy and paste....

We use copy and paste short cut keys many times.
Yet, keep practicing when you are in the office...

Excel 2007

Values : Ctrl+C -> select a cell if you want to paste -> Alt+E ->S ->V-> Enter
Formulas : Ctrl+C -> select a cell if you want to paste -> Alt+E ->S ->F-> Enter 

Formats :  Ctrl+C -> select a cell if you want to paste -> Alt+E ->S ->T-> Enter
 
Excel 2003 

Values : Ctrl+C -> select a cell if you want to paste -> Alt+S ->V-> Enter
Formulas : Ctrl+C -> select a cell if you want to paste -> Alt+S->F-> Enter 

Formats :  Ctrl+C -> select a cell if you want to paste -> Alt+S->T-> Enter