Challenge
Something that is difficult to do
Preferred
Wanted or liked more than another thing
Generate
To create
Dull
Uninteresting or boring
Run into
Encounter or meet
Distracted
Unable to focus on something
Design
To plan and/or build something
Multitask
To work on more than one thing at a time.
Programming
The designing or writing of computer programs
Concentration
The ability to pay close attention to something
Drop
To stop doing something
Productive
To get a lot done
Engaged
Interested in or focused on something