One of the keys to success for a manager is effective delegation. But that assertion gives rise to a question, as to how you can ensure that you delegate effectively, as a manager.
Firstly, it is important for you to ensure that you select the people to delegate to carefully: to ensure that they are people who really have what it takes to do the work that will be delegated to them.
Secondly, it is important, when doing the actual delegation, to state your expectations clearly.
Thirdly, it is important to ensure that you get regular updates from the people you delegate to, as they go about performing the delegated duties. The updates can be through face to face meetings, if such meetings can be organized. The updates can also be through the phone. Yet another way in which the updates can be done is through web-based instant messaging. This can be done via, among others, the GTalk client, which is nowadays integrated with Gmail, such that when you undertake Gmail login at the www.gmail.com login page, you also, by extension, login to the integrated instant chat client.
Fourthly, it is important, at the end of the whole thing, to give feedback to the people you delegated to, telling them — very tactfully — how well or poorly they performed. This should be helpful if you ever have to delegate through them in the future, as they would know what to do better.