Do as much for yourself as you would a good friend. Every time you criticize yourself, replace automatic negative self-evaluations with positive ones. Balance what you do for others and what you do for yourself. Realize that you are just as important as others are. Let others take care of their own needs more often.
Life involves give and take.
Both are important. Be active in a civic or social organization in your community. This gives you opportunities to help your community and to realize the valuable skills that you have to offer. Keep rejection in perspective. Rejections are part of life.