I am guessing that a good portion of the readers are in the young-married/friends-having-kids zone. Even if not, going to give this tip out for free and you can tuck it away for later.
You will inevitably get asked to celebrate the arrival of A.N.Other's bundle of joy at some point, and if they are good friends of yours it is even harder to pick the perfect gift for the young whippersnapper. When my godfather was in this situation he decided to give baby 10e a pair of monogrammed cufflinks. Sort of like giving the new mother a bottle of champagne... (one of Oma's tricks). Anyhow, we have taken this trick and housed it in the stable of good calls. Can't recommend it enough.