A saddle wedge is the easiest way to keep your toolkit, puncture repair kit and mobile phone with you at all times. They're a lot safer than carrying tools and stuff in your pockets - which can result in diy kidney surgery if you fall off! A small saddle bag will hold the essentials - fit one to each of your bikes so you don't forget anything. Larger models have space for an energy bar or even a set of waterproofs.