As the others have said Not a Stupid Question.
I have used homemade sand bags to decent store bought bags and rests.Really cant say one is any better as a whole over the others but I do like the Caldwell "Rock Deluxe" from Midway USA and other places for the front and sandbags under the rear.
http://www.midwayusa.com/eproductpage.e ... mid=412484
Also have the older Outers version of this Shooter Ridge shooting rest it isn't bad either.And it comes in handy as a take along on hunts.Note got to be careful on were you place the rifle in this type,have taken the grip cap off a couple a time or 2.
http://www.midwayusa.com/eproductpage.e ... mid=341095
I have also used a short bi-pod on the front with sandbags under the rear a few times.
IMO, the Rest one usees to ZERO a rifle isn't as near important as what they are setting on.I much perfer a good soild and stable and level platform for that.That I can rest my elbows on and is real comfortable aiming from.
The above along with being consistant on each shot,breathing,trigger pull,and the rifle being in the same spot/postion each shot will show best on the target.Some rests come with a forend stop/rest to aid in this,but a piece of masking tape on the forend marking the front rest postion works just as well.I perfer to lightly crasp the forend myself as I generaly do when out hunting,so I don't use the forend stop myself.
I sometimes clean at the range between groups,always clean whitin a day or two at the house unless I'am heading out hunting,then I wait till the season or hunt is over.
Good Luck.