The salary increase
Anyone who knows something about rhetoric already knows some tricks for negotiation. In direct conversation with the boss or supervisor, some of these rhetorical tips might help you:

Try to convince your employer that you care about the company’s success, so the focus was more on the development of the company than on your own. Instead of ‘I would like to work on my professional skills and my professionalism’ ‘I would like to contribute much more to the success of our company within the next few years’ would fit much better here.

Talking is silver, silence is gold ‘is mainly in negotiations, count on what added value you offer the company, but do not entangle yourself in unnecessarily long debauchery. Especially after catchy arguments you should use rhetorical pauses, so that the argument can also sink.

It is also important to make some matches, so to let the boss say ‘yes’ more often. You should probably not use the trick of having your counterpart say three times in succession with any phrases, but by now you know almost everybody and certainly your boss. Try to ask a question in between, to which your boss can only say yes, something like, you are certainly interested in the continuous development of your employees, right? ‘.

Certainly, sooner or later a statement like ‘I’m not sure if your current performance matches your salary requirements’ will come up. Since this is certainly not the case, you can do very well with something like, ‘I’m trying to improve constantly, could you tell me specifically, in which areas my services do not meet your expectations?’. If, contrary to your expectations, your boss can name a few points, assure him that you will naturally work on it. (And of course, the salary increase would only positively influence the improvement process.)