Can't... There is no such word in a creator. That is not the truth of You. Switch your language to positive words.
Should...You should remove "should" from your vocabulary. :) What is your biggest should of yourself. Let go of all those shouldy attitudes. Let go and... Shift Happens!
Need... What do you need? Need is an illusion. You are perfect, whole and complete - you are not needy. Need is denial of abundance.
If you say, “I don’t want…” then your mind goes right there, to focus once again on what you don't want. Start shifting your words. I have to have this done can become I would love to have this done.
Put your focus on what you do want.
Call forth what you want.
Make it a great day!