On the situations you have given, it is likely that the person will come and ask again, if they are insistent, and I will have to say a clear "no" sooner or later. On the documentary I saw regarding this topic, I learned that basically the root problem to say "no" is that we don't want to offend. I have learned that. So, I guess what I was trying to ask was more so along the lines of that once I say "no", what can I do to make myself feel better afterwards, after I just finished offending someone by telling him/her "no"? Thanks.