The reason why you think they are unnecessary is: a) because you
are too familiar with the form, and b) overuse of the same verb
- 'Enter'. For someone who has never seen the form before, the
verb can be a vital clue as to what is expected of them in terms
of typing a response, or selecting an option. In order to reduce
the repetitive nature and monotony of using the same verbs
across a long survey type of form, you may find it useful to
vary the exact words used. However, a good alternative is simply
to rephrase as questions, especially where it's a number
involved in the answer. In fact by using a question style like a
census (Think along the lines of "Who usually lives here?",
"List the names of...", "What type of accommodation is this?",
"Who is your landlord", "How many of these rooms are bedrooms?")
you implicitly indicate to the reader what kind of response is
require without having to include words like 'Enter', 'Select',
'Choose'. A brief but clearly worded question establishes some
basis for being a