If we have to make a dish tomorrow for our breakfast the previous night we should see whether all required ingredients are there or whether to obtain them. Another way is to see what is available in the kitchen and plan something from the available items. What I mean is we should be proactive and make arrangements well in advance to see that we will progress well without any disturbance. Generally, the problems will come due to our attitude or planning only. Our colleagues will never try to hamper our work but it is a general statement to blame on somebody.
Many of us will be defensive always and try to find something which is beyond our reach as the reason for our failures. This is very common these days. Even in a group, there will be a leader who will oversee the works of all the team members and provide supplementary help wherever required. But some people who never work try to complain about others and forget their own inefficiencies.
Knowledge is power.
It might be possible that someone would drop once we are engaged in activities and the same can be deferred for the time being to join him but the same task is to be fulfilled according to its revised scheduled. The best option is to think all the aspects which could delay in completion of the tasks within our hands. Hence a careful consideration is required at least a day earlier so that nothing is left out for which we may have the concrete plannings.