Honestly if you feel you are not doing a good enough job welcome to the next 30 years of your ups life. It'll never be enough and there will always be more you could be doing.
Presuming you are topped out(or close) "driving a few years"
Lets add up your lost pay:
1hr/day 5hrs/week 245hrs/yr(49weeks if you have 3weeks vac)
Lets roughly say you take home $25/hr after taxes
$6,125 a year, oh but wait, if you are working over 8 that has the potential to be all OT
so $9,187
Say you work another 25years, that's $229,000
Go ahead fix my math... but I'm gonna say TAKE your BREAK!