[scribus] Smaller file sizes?

[Nigel Ridley]

I have to ask this;

How can I produce a reasonable looking 2 page (A4) PDF file that is less than 1 Mb?
I ask this because I receive a couple of PDF's via email per month that are similar in content as 
the ones that I produce (a top full width logo; two column text with 4 or 5 jpg's) but their's 
are around the 500 KB mark whilst mine are 1.3 Mb! Their's are produced using 'easyPDF SDK 4.3' 
and 'InDesign CS 3.0.1'.

I have done everything in the export to PDF to get the file size down (resample to 72 DPI etc).
How do the competition manage such small file sizes?

Blessings,

Nigel

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