90 days goals is an attainable process on getting things done.
In the fast changing world of technology, having a 1, 3 or even 5 year plan isn't feasible or realistic as the rate of our world changes at is incredible- technology, world events and markets are changing at extremely high rates and keeping to a 90 day plan gives more direction, focus and results while offering the flexibility to change direction.
Time allocation Table:
1 project- 100% time to work on it
2 projects - 40% time to work on it- 20% lost to content switching
3 projects - 10% to work on it - 20% lost to content switching