Winch Anchors

If you join a 4wd club they can show you how.
Drive three star pickets into the ground about 45%, each one mtr apart. tie the top of first picket (one nearest vehicle) to base of second picket then do likewise from this picket to the last picket. Then attach winch rope to the base of the ist picket and slowly add weight. This usually works but always be carefull as Murphy's law is King here.
RegardsDodg

If you are handy with a welder, you can make yourself a "ground Dog", which is a flat bar of 75mmx12mm about 900mm long and has 16mm holes drilled along it's length about 50mm apart. One end has an eye welded to accept a 16mm bow shackle for connection to the winch rope. You carry a selection of steel spikes, in various lengths, which have a eye welded in the top of them for later removal purposes. Drive the spikes into the ground, through the holes, use as many as it takes to hold fast. Works a treat in firm ground, not so good in sand. For that you can make a spiral rod, that you twist into the sand to a depth of about 1m and then place a slotted plate over the end to rest on the surface, connect to the end and winch away .For the spare wheel anchor, bury the wheel vertical is best, but horizontal can work too, you need a sturdy length of bar or tyre irons to place across the side away from the winch, connect via a chain and allow a slot to let the winch rope ease out of the pit to the winch. You can heap more sand on top of the buried wheel if need be. Or, just do one of my recovery courses and I'll show you all the tricks!