B – off. ‘To put off’ means to postpone, to delay doing something, to move it to a later time or date. ‘To put away’ means to set aside, usually about some objects, e.g. ‘he put away his phone and went to bed’. ‘To put down somebody’ is to criticise them.
A – by. ‘To be characterised by something’ is to have qualities or properties of it, e.g. ‘Introvert behaviour is characterised by reluctance to communicate with other people, especially strangers’.
D – drawing. ‘To draw up a plan’ is to come up with a course of action for a certain period of time. ‘To make up’ is to think of something imaginable, e.g. ‘to make up a story’. ‘To think up’ is to come up with an idea through mental effort. Answer C does not make a phrasal verb.
C – contain. Keep in mind that the verb ‘contain’ refers to the word ‘plan’ and therefore should collocate well with it. ‘Consist’ need preposition ‘of’ here. Other options do not fit the context.
D – accomplishment. Context is important here. Since we are talking about small things, they do not warrant calling them ‘victories’ or ‘triumphs’. Accomplishment is something that you manage to do, whether small or significant.
B – treat. ‘To treat yourself’ is to indulge one’s desires, usually as a form of rewarding. ‘To help yourself’ is usually said to another person to invite or encourage them to try or taste something. It is not normally used to refer to yourself.
A – to. We are talking about limiting factor, not a limiting body or individual (in which case it would have been ‘by’)
C – takes. ‘Whatever it takes’ is a set expression that means ‘no matter what, it has to be done’.