If you own a Raspberry and have GuldenD running on it there are some settings that could influence how well it works.
If you are totaly unfamiliar with navigating a linux systme from the commandline and your RPI is working fine you do not have to do anything, if it ain't broken don't fix it.
For these changes you need access to the commandline, either via VNC, SSH or by connecting a keyboard and monitor (TV with HDMI will work fine) to it.  Then edit the file Gulden.conf using the command:
`nano /opt/gulden/datadir/Gulden.conf`

1) When Phase-3 went live there were problems with high CPU and memory usage.  We found some workarounds by then that alleviated the problem but are not necessary anymore since version 2.0.0.9 (Or even counterproductive now):
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maxmempool=20       <-- remove
dbcache=20                <-- remove
maxsigcachesize=4    <-- remove
rpcthreads=1              <-- remove
par=2                           <-- remove
minimallogging=1       <-- remove, this is now the default on RPIs

2) 'tweaks' that _are_ usefull on RPIs.  (If you made changes to these before please check the values given below)
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maxreceivebuffer=1024   <---- default = 5000 which is a bit high imo (5MB).
maxsendbuffer=256         <---- 512 is also fine.
maxconnections=60         <---- Around 50 or 60 is fine.  Do not go higher than 75 on an RPI unless you know what you are doing.

These settings also apply on more beefy nodes running on a VPS although there you can go way higher on maxconnections= but that depends on how powerfull your (virtual) CPUs actually are.

3) Add the adress of one or two (more than two is not necessary) known stable and up to date nodes.  By doing this your node connects to this one first which means it will probably elect it as the 'preferred download'.
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addnode=83.161.66.135
addnode=185.167.206.35

All of these also apply for beefier nodes running on VPSes and whatnot with the exeption of 'maxconnections='.  More powerfull machines can go with a much higher number there depending on the exact power of your (virtual) CPUs.  400 or more is cool if it's faster than an Intel Atom and has 2GB RAM (ymmv).