Each of the following verb-noun combinations should be replaced with a single word:
have discussions (replace with discuss)
make a decision (replace with decide)
have a preference for (replace with prefer)
give assistance to (replace with assist, or better yet, help)
undertake studies (replace with study)
make revisions (replace with revise)
take action (replace with act)
in agreement (replace with agree)
take into consideration (replace with consider)
take under advisement (again, replace with consider)
Unnecessarily wordy phrases lessen the force and precision of your writing. Don't use two or three words when a single word will suffice.