Speed issues and trips to the database

[Proctor]

Hello: I have a .net windows app created using 2005.
one of my forms is taking longer than i would like to load.

when it loads, I call numerous subroutines that go to the web server via a web services to get data from the database that also resides there....to populate all the drop downs on the form:

 Private Sub LogJobs_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Call PopulateCustomers()
        Call PopulateContacts()
        Call PopulateTerritory()
        Call PopulateSales()
        Call PopulateComments()
        Call PopulateSignName()
end Sub

Here's a code example for one of them....they pretty much all look similar:

Public Sub PopulateTerritory()
       If IsNothing(tblLookupTerritory) Then
            Dim oService As New SloanLEDEstimator_WebService.Service
            tblLookupTerritory = oService.PopulateTerritory()
        End If
        Try
            If tblLookupTerritory.Rows.Count >= 1 Then
                With cboTerritory
                    .DataSource = tblLookupTerritory
                    .DisplayMember = "Territory"
                    .ValueMember = "Territoryid"
                End With
                cboTerritory.SelectedItem = 1
            End If
        Catch
            MsgBox("An error occurred in PopulateTerritory " & sql)
        End Try
    End Sub

I was thining perhaps it would be better to make one trip to the server and get a list of datatables to return with.
Do you think this is the better way to deal with this?

Thanks,
Proctor