When our children were small we often prayed blessings over them as an encouragement. When our son was aged five his class attended church every week and after about a year or so our son asked if he could have a word with the vicar at the end of the service. He then proceeded to pray a traditional blessing over the minister, which the teacher, when she told us about it that day, said moved her and the vicar both to tears. Another year passed and we were in a service where this same vicar was speaking and recounted the story of a time when he was going through a very difficult time and feeling very low, when a little boy prayed a blessing over him at the end of a school service and that simple blessing made a world of difference.
So, for anyone who's going through tough times:
The Lord bless you
and keep you;
the Lord make his face shine upon you
and be gracious to you;
the Lord turn his face toward you
and give you peace.
Numbers 6:24-26