From one of my mailing lists:
1. Take out a sheet of paper and draw a vertical line down the center.
2. On the left side, write down the names of all the negative people that suck the life out of you and whom you dread seeing.
3. On the right side, write the names of all the people who give you energy and motivate you.
4. Make a 30-day commitment to minimize the time you spend with the energy drainers and maximize your time with the energy suppliers (and then continue this strategy for life.)
If only it was really that easy…