It is hard to drag yourself away from the computer when deals are happening! 

Be aware that your cognitive abilities decline when you don’t take a break. 

Sales people are often criticised for not paying attention to detail.

When fatigue causes errors occur at the quoting and contracting stages they are usually expensive to fix!

A friend of mine who managed a telco division was new to the job and was putting in many late nights.

One of his BDMs requested he sign off on a quote that (in hindsight) required more oversight. Unfortunately that single error cost the telco division $1M. My friend recovered from that mistake but not without a lot of worry and stress. 

Don’t fall into the same trap!