I used an old MTN bike shifter to replace the SRAM twist shift, added a leather saddle, bar ends, 11-32 rear cluster, Shimano two way pedals and made a bag to hang off the saddle. I also used a longer stem, 120 mm, to replace the stock one, giving me a bit more room to stretch out. If your bike is new I would recommend repacking the hubs and headset and pulling the bottom bracket to thoroughly grease the threads. I don't know why they were so skimpy with the grease as a generous application of quality grease costs almost nothing extra.That is the one thing I would do right away as everything else is just personal preference. Be very careful with the metal hub seals as they are easily bent.