Gony,
If you talk nicely to your postman (lady?) and explain they will often find ways of helping with the need for magic. For instance, mine has adopted the following procedures for the delivery of things that are obviously magic (i.e. they bear a sticker from the sending company).
Items in this category are thrown/placed by my postman into the large coniferous treee in the middle of my garden. This ensures that detetection by any unsuspecting (or in the case of my wife, suspicious) person is almost unlikely to happen.
To inform me (hereafter called the mage) that there is a delivery, the postperson now takes the last flowerpot from the row on empty flowerpots outside my study window and turns it upside down. If there is one parcel (a poor day!) this is the first flowerpot on the left, if there is two, then it is the second and so on until it become the end pot (and I have to visit the toilet before fishing the parcels out due to excitement getting the better of me).
Now, when I get home, I quickly (using the art of misdirection courtesy of the fine Fitzkee series of books I have purchased) go into the garden and empty the paper from the study into the recycling box and retrieve the first item (which is then secreted or as I prefer 'palmed' about my body). A word of warning here, any parcel containing wands should not be stuck down trousers, I've done this and the lady next door no longer talks to me without blushing
.
This is then repeated using the bottles and should there be more (oh joy, the tins, the cardboard items and then if necessary watering the garden comes in handy as a good ruse to revisit the drop off point.
I hope this helps to save your marriage! It has certainly saved mine (and enhanced my reputation with the lady next door).
More later, just realised wife is about to leave and I have to unwrap my eight volume collection of Tarbell (plus the two Gospel additional volumes) and hide them behind the desk before she returns.
Vic
ps. To aid you in your desire to be a better magician, may I recommend the 'Secret Army' and 'Colditz' videos, I find their advice on floorboards storage holes invaluable for the DVD collection!