Although you may have to organise a business event yourself there are many corporate services available from dedicated event organisers.
Have a look at the following to give you an idea as to the type of service they provide and it will also give you some ideas as to what you should do when organising a business event.
Here you will find some industry led comments on how to organise a business event.
Note there are also exhibitions for Event Organisers – so might be something you would benefit going to if you find you are responsible for organising more and more events.
Do a regular search for such exhibitions so you can see when the next one is coming up.