Another really good option is to turn up at the village shop in Peaslake and ask around for a guide for a bit. Equally, do the same over at the Tower. There's plenty of friendly folk who'll show you some superb stuff.
The maps are great, but to really get to know the maze of trails (and link them all up in a good route) nothing beats riding with some of the regulars!
My usual loop there is as follows;
Start at Peaslake, ride up Holmbury Hill.
Descend via Parklife and Telegraph (Take the right near the end, down the steep section!)
Road transfer through Holmbury St Mary.
Climb up Greensands Way to High Ashes Farm, then on to the Tower.
Down from the Tower on to Summer Lightning and the other trails in Redlands.
Back up, over the Tower again and down what we know as Pint Glass (One of the myriad hidden moments!)
High Ashes Farm back down the Mother (descent of the Greensand climb from earlier)
Over the top of Holmbury, down one of many to the top of Barry Knows Best.
BKB is sublime and finishes on the road above Peaslake.
Road down to Peaslake for a pint and/or tea and cake. Lovely.
I might even be up there for a little while early on Sunday, hangover and Tour depending! Keep yer eyes peeled for a blue '08 Spesh Enduro