First check emails, any jobs at task should then be taken care off. These range from transferring domains, checks: backorders, expired domain auctions, domain auctions, whois records, domain verification's at marketplaces, replying to offers.
As the day progresses I tend to look for new opportunities which may involve scanning expired domain list, auctions at platforms and as I invest in tech and trend domains I usually delicate some time to check news and related articles in circulation.
I check namePros regularly for interesting topics and if I have the time I usually try to help someone there, this might involve giving an honest appraisal or replying to quires related to domaining.
Some days I spend trolling through 1000's of domains in expired domain lists to find the diamond in the rough and checking after sales reports at namebio.
In short the day never finishes and often I find myself continuing the previous days work again and again.