GL's remark is more of a statement than advise but it is absolutely true.

As for advise/tips here are three that I've found invaluable.

1) Leave your bike in small ring/small cog when not in use to save the derailleur springs.

2) Bike fit is everything. In other words don't sacrifice comfort for looks. If you can't ride pain free then you can't go fast.

3) Chamois cream. Use it.