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 able to make sense of what is wanted - without doubt. Just having the label 'Landlord' for example might mean 'Do you have a landlord?', 'Are you a landlord?', 'Who is your landlord?'.
So brevity is good, but clarity is even better - and especially if there's any possible reason for ambiguity. The 2011 UK census doesn't even just say 'Name', it says 'What is your name?', and believe me, census forms have to be filled in by anyone and everyone.
You may also want to consider adding a please to the first item as a polite way to kick things off. (No need to do it on all subsequent items)
So for example:
- Please choose a shift:
- What top 3 skills do you consider critical to the job:
- Enter any certifications:
- Where is your work venue:
- How many beds at your location?
- How many people do you manage both directly and indirectly?