  We present the longest-term timing study so far of three Rotating Radio
Transients (RRATs) - J1819-1458, J1840-1419 and J1913+1330 - performed using
the Lovell, Parkes and Green Bank telescopes over the past decade. We study
long-term and short- term variations of the pulse emission rate from these
RRATs and report a marginal indication of a long-term increase in pulse
detection rate over time for PSR J1819-1458 and J1913+1330. For PSR J1913+1330,
we also observe a two orders of magnitude variation in the observed pulse
detection rates across individual epochs, which may constrain the models
explaining the origin of RRAT pulses. PSR J1913+1330 is also observed to
exhibit a weak persistent emission mode. We investigate the post-glitch timing
properties of J1819-1458 (the only RRAT for which glitches are observed) and
discuss the implications for possible glitch models. Its post-glitch
over-recovery of the frequency derivative is magnetar-like and similar
behaviour is only observed for two other pulsars, both of which have relatively
high magnetic field strengths. Following the over-recovery we also observe that
some fraction of the pre-glitch frequency derivative is gradually recovered.
