I recommend a dry erase board with items you check off daily with the final item being to erase all the checkmarks for the day. This makes things like stretching, 10 min meditation, flossing, snacking on nutrient rich foods easier to ingrain as habits.
I found a dry erase board to work much better than anything printed or digital.
Also: Don't forget to take into account the range of possible gain/loss in utility from a decision when deciding how much time to spend analyzing your decision. Many decisions that seem hard are only difficult because the outcomes are so close in utility (e.g. peanut butter A instead of peanut butter B).
I'd also like to say that in general I find checklists, catchphrases, and rules of thumb et al to be MUCH more useful in behavior modification than anything more rigorous. A leaky abstraction that you actually use (and moves you even somewhat closer to optimality) is better than the perfect heuristic you don't use.
Doctor Peter Pronovost has managed to single-handedly reduce the infection rates in ICU facilities nationwide from numbers like fourteen percent or twenty percent to zero. His solution is idiotically simple: a checklist. In a process as complex as ICU treatment, doctors perform chained simple steps very many times, and it can be easy to forget a step. These things add up. Read the article before continuing.
In their phenomenal book, The Power of Full Engagement, Jim Loehr and Tony Schwartz discuss a pattern they have discovered among all top performers, ranging from sports to music and business. Beyond a certain level, all top performers had established positive rituals for relaxation and deliberate practice. These positive rituals were daily ingrained habits and allowed them to surpass the merely excellent performers.
It is difficult to make use of most Less Wrong posts in terms of changing one's behavior. Even if you integrate a lesson fully, you will still miss steps on occasion. I propose we suggest checklists for various recurring activities that will offload these responsibilities from conscious thought to its much more reliable brother, ingrained habit. Fortunately, we should not need many checklists.
An example of a checklist is a morning routine:
Another example of a checklist is during a conversation with a non-rationalist on the 5-second level: If you feel strong affect (anger or annoyance) at someone's point in a debate,
Think of this as a re-run of the 5-second level post, with an outreach towards more than just specific rationality skills. The checklists that are not required to be performed extemporaneously (i.e., not in conversation) should be like a physical checklist, that one can write down and should go through every time.