1. You never seem to have the time to get things done.
2. Always rushing to completion because you cannot plan to start sooner.
3. Work is done poorly for lack of time to do it right.
Poor time management can leave you totally frazzled, and beleaguered by people who need things from you yesterday. It can also mean missed appointments and opportunities.
If you manage your time poorly you always feel like you are never getting anything done, and the things that do get done are not done well. You also never have any free time to get to have any fun and that is the worst consequence of all. You need toplan time for work and plan time for fun.